📢 Latest Update
The Bihar Public Service Commission (BPSC) has officially released the Assistant Environmental Scientist (AES) Answer Key 2026 for Advertisement No. 88/2025. Candidates who appeared in the written examination held for 17 Assistant Environmental Scientist posts can now download the provisional answer key and verify their responses.
The Commission has uploaded subject-wise provisional answer keys for General Studies, Physics, Chemistry, Life Science, and Environmental Science. Candidates can also raise objections against any incorrect answer within the prescribed dates through the official BPSC portal.
📌 BPSC AES Answer Key 2026 Overview
| Particular | Details |
|---|---|
| 🏢 Organization | Bihar Public Service Commission (BPSC) |
| 📄 Advertisement No. | 88/2025 |
| 💼 Post Name | Assistant Environmental Scientist (AES) |
| 📊 Total Vacancy | 17 Posts |
| 📝 Exam Type | Written Examination |
| 🔑 Answer Key Status | Released (Provisional) |
| 📂 Category | Answer Key |
| 🌐 Official Website | bpsc.bihar.gov.in |
📅 Important Dates
| Event | Date |
| Online Application Start | 27 August 2025 |
| Last Date to Apply | 19 September 2025 |
| Admit Card Release | 04 June 2026 |
| Written Examination | 11 June 2026 |
| Provisional Answer Key | 08 July 2026 |
| Objection Window | 08 July – 12 July 2026 |
| Final Answer Key | To be Announced |
| Result | Notify Soon |
📚 Subject-wise Answer Keys Available
BPSC has released separate provisional answer keys for the following papers:
✅ General Studies (Paper-I)
✅ Physics
✅ Chemistry
✅ Life Science
✅ Environmental Science
Candidates should download the General Studies answer key along with the optional subject they selected during the examination.
💰 Application Fee
- All Candidate : Rs. 100/- (Any Category)
- Additional Biometric Fee (if Aadhaar not provided) : Rs. 200/-
- Pay the Examination Fee Through Online Mode.
🎯 BPSC AES Notification 2025 : Age Limit as on 01/08/2025
- Minimum Age: 21
- Maximum Age 37 Years for Male and 40 Years for Female
- For Age Relaxation Kindly Read Notification
📋 BPSC AES Recruitment 2025 : Vacancy Details Total 17 Post
| Post Name | Total Post | BPSC AES Eligibility 2025 |
| Assistant Environmental Scientist | 17 | Post Graduate Degree in Chemistry, Biology, Environmental Science, or Physics is mandatory. |
Category Wise Vacancy Details:
| General | EWS | SC | ST | EBC | BC | Total |
| 07 | 02 | 02 | 01 | 03 | 02 | 17 |
🚀 📥 How to Download BPSC AES Answer Key 2026?
- Follow these simple steps:
- Step 1: Visit the official BPSC website.
- Step 2: Open the latest notification section.
- Step 3: Click on Assistant Environmental Scientist (AES) Answer Key 2026 (Advt. No. 88/2025).
- Step 4: Select your subject.
- Step 5: Download the PDF answer key.
- Step 6: Compare your responses carefully.
⚠️ How to Raise Objection?
If you find any incorrect answer in the provisional answer key, you can submit an online objection.
Steps:
- Login using your Username and Password.
- Select the question number.
- Upload supporting documents or proof.
- Pay the prescribed objection fee (if applicable).
- Submit the objection before the last date.
Only online objections submitted within the official objection window will be considered by BPSC.
📊 BPSC AES Exam Pattern
| Paper | Marks |
| General Studies | 100 Marks |
| Optional Subject | 300 Marks |
| Interview | 50 Marks |
The written examination carries negative marking of 0.33 marks for every incorrect answer. Candidates can estimate their probable score using the provisional answer key.
🎯 How to Calculate Expected Marks?
Candidates can estimate their score using the following method:
✔ Match your answers with the official answer key.
✔ Add marks for every correct response.
✔ Deduct negative marks for incorrect answers according to the official marking scheme.
✔ Calculate the final estimated score.
📋 Selection Process
The recruitment process consists of:
✅ Written Examination
✅ Interview
✅ Document Verification
Candidates qualifying in the written examination will be shortlisted for the interview round as per BPSC rules.
📄 Documents Required During Document Verification
- Admit Card
- Application Form
- Educational Certificates
- Category Certificate (if applicable)
- Photo Identity Proof
- Passport Size Photographs
- Other documents mentioned in the notification
🔗 Important Links
| Download Answer Key | General Studies | Physics | Chemistry | Life Science | Environmental Science |
| Download Answer Key Notice | Click Here |
| Download Admit Card | Click Here |
| Download Admit Card Notice | Click Here |
| Apply Online | CLICK HERE |
| Download Notification | CLICK HERE |
| Download Syllabus | CLICK HERE |
| Official Website | CLICK HERE |
❓ Frequently Asked Questions (FAQ)
Q1. Is the BPSC AES Answer Key 2026 released?
Ans: Yes. BPSC has released the provisional answer key for Assistant Environmental Scientist (Advt. No. 88/2025).
Q2. When was the BPSC AES Answer Key released?
Ans: The provisional answer key was released on 08 July 2026.
Q3. What is the last date to raise objections?
Ans: Candidates can submit objections from 08 July to 12 July 2026 through the official portal.
Q4. How many vacancies are available in this recruitment?
Ans: A total of 17 Assistant Environmental Scientist posts are being filled under Advertisement No. 88/2025.
Q5. Is the released answer key final?
Ans: No. The current answer key is provisional. BPSC will publish the final answer key after reviewing valid objections.
Q6. Can I calculate my expected marks?
Ans: Yes. Candidates can compare their responses with the provisional answer key and calculate their probable score using the official marking scheme.
Q7. What is the next stage after the answer key?
Ans: After the objection process is completed, BPSC will release the final answer key followed by the written examination result.
🔥 Important Note
Candidates are advised to read the official notification carefully before applying online. Fill all details correctly because wrong information may lead to rejection of the application form.
✅ Conclusion
The BPSC AES Assistant Environmental Scientist Answer Key 2026 provides candidates with an opportunity to assess their performance before the declaration of results. Applicants should carefully review the subject-wise answer key and submit objections, if required, within the stipulated deadline. After evaluating all objections, BPSC will publish the final answer key and proceed with the result declaration and subsequent selection stages.