Hello Aspirant,

Since you don't have mathematics in class 12th , you won't be able to pursue certain courses like mathematics hons, physics hons, chemistry hons, for that you need mathematics as a compulsory subject in 12th class. You can purse other courses related to Biology. And about your optional subject, it can be included but you'll have to face deduction from your percentage of 2-2.5%. if the subject is in List B then 2% will be deducted otherwise 2.5% will be deducted. So do check the Subject Lists A and B carefully.

You can check eligibility criteria for various courses from the link below:

https://university.careers360.com/articles/du-bsc-eligibility-criteria

You can use this college predictor:

You may also check this link for expected cut offs for various courses in Delhi University:

https://university.careers360.com/articles/du-cutoff/amp

Hope this helps you!

All the Best!