In order to get over this problem you should solve as many papers as possible and try to know which are the topics or the type of questions where you get confused the most. If you are confused because you are not able to remember small details then you should revise them again and again. This should help you in getting the hold of your problem. Hope this helps.

Dear,

If you have a confusion in choosing the Correct option it means that you are not clear on the Concept. May be you are good in Biology, but the questions are designed in such a way so as to confuse you and pick up a wrong answer Choice. So you should be very clear about the Concept and confident about your answer. Then you will improve your Accuracy.

Hey,
Well,this is something that almost every Medical Aspirant faces ar one point or the other. The reason is quite simple. You simply solve objective questions witbout understanding the text. Firstly,be thorough with NCERT Biology. Read every line and understand it's concepts. Then read the class notes and your study material. And then solve the objectives. Trust in yourself and be confident.
Career360 is coming up with talent Search exam for the Medical and Engineering Aspirants. For further information follow the link given below:
https://learn.careers360.com/careers360-talent-search-exam/?icn=qna&ici=interns
Hope this helps.
Good luck.