IISER IAT Tentative Answer Key 2025: The Indian Institutes of Science Education and Research (IISER) issued the tentative answer key for the IISER Aptitude Test (IAT) 2025. Applicants who took the examination on May 25, 2025, can now see the answer key on the official website, iiseradmission.in. IISER IAT 2025: Important eventsApplicants who took the IISER IAT test are urged to review the following list of crucial dates for the 2025 session.1. IAT 2025 exam: May 25, 20252. Provisional answer key: May 25, 20253. Objection window: May 29, 2025 (5:00 pm) to June 1, 2025 (5:00 pm)4. Document upload window: June 1 to June 16, 2025 at 5:00 pm.Note: Aspirants must upload all required documents within this time frame to be evaluated for admission in their respective categories.IISER IAT Answer Key 2025: Objection WindowIISER has introduced an objection window to maintain openness and resolve any anomalies. Aspirants can submit challenges to the provisional answer key between 5:00 PM on May 29, 2025 and 5:00 PM on June 1, 2025.How to raise an objection against the IISER IAT Provisional Answer Key 2025?To raise objections, applicants must follow the steps outlined below.Step 1: Enter the application number or registration number along with the password to access the IISER admissions portal.Step 2: After this, go to the response sheet and use the temporary answer key to compare it.Step 3: Now, choose the question or questions the candidate wants to dispute, then give a thorough justification and any supporting documentation.Step 4: Next, make sure all supporting files are within the 400KB size restriction and upload them in the jpg, jpeg, png, or pdf formats.Step 5: At last, a non-refundable charge of Rs. 100 must be paid for each contested question.IISER IAT 2025: Final answer key and resultAfter analyzing all submitted complaints, IISER will publish the final answer key. The results of IAT 2025 will be announced later. The dates will be provided soon once the answer key objection procedure is completed.