Hi,

Provisional Answer Keys that are released right after the exam, contains all the correct answers to all the questions asked in that attempt of JEE. During this time, the candidates can challenge any particular question/(s) if they think that the answer given in the provisional answer key is wrong.

The JEE authority goes through these challenges (if any) and reevlautes their answer key, and if they discover that some of those questions are genuinely wrong then they decide to drop those questions. After that, they proceed to release the final answer key which is the closest to all correct answers.

For example, in one of the July 2022 attempts of JEE Mains 6 questions were dropped upon discovering that they were incorrect. So yes, if such a thing happens then you would see some changes in the final answer key which werent there in the provisional answer key.

I hope that was helpful.

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