The answer key is said to be provisional this is because one student can apply for challenging the answer key. So if any student challenge some question and if the answer is found to be correct then there will be change in the answer key. But this is subjected to a specific case, if there are no changes then the answer key will be the same.

To know more about ASSAM CEE visit the link below:

https://engineering.careers360.com/articles/assam-cee

I hope this answer helps. All the very best for your future endeavors!