During the test

in my latest 2 BMAT papers, I answered 2 questions wrong even though i know their correct answer and when i read the Q again after the test i just got the correct answer. i wanna avoid this in the imat.
could u please suggest reasons for that, and if you underwent this before can u tell us how you tackled the problem.

btw it wasnt time wasnt the reason becasue i think that i gave it enough time and it is probably not that i dont know a lot about the subject becasue i knda do and the Q anyway was a relatively not tricky one.