Hello aspirant,
I am here for helping you.
Before going with any of the subject firstly I will recommend you to see in yourself that where your interest is . If you have passed your class 12th with biology , computer science , nutrition and chemistry you have many options which you can persue :
some of these options are given below:
1. You can be a nutrition.
2.you can go in chemistry line with Bsc chemistry honour.
3.you can persue Bsc from computer science.
4.you can go with Bsc biology honours.
etc.
see in yourself where you want to go, what you want to go, don't go with people influence, always remember that: " peer pressure sometime may cause of bad decisions".
Don't entangle in the  surrogate of peer pressure .
I hope it will help you..
For more queries you can upvote me and can ask in the comment box.
Best of luck.