Hey Sania !

If you want to do Bsc life science so the eligibility criteria is to have completed 10+2 schooling or equivalent, which includes Chemistry, physics and Biology (PCB) as subjects, with an aggregate of 50% marks are eligible for BSc life science so it will be more better if you consider Physics, Biology and Chemistry and any other subject like Hindi or English etc as your Best four subjects it will increase your chances to get admission in DU.

I hope this information might be helpful for you,

All The Best !!!