CBSE 12th

If you apply in Delhi University your top four subject's percentage will be counted.
Chemistry
Biology
English
After calculating your percentage you should check the cutoff for admission.

For applying in sports management course you need to have passed 12th in any stream from a recognised board.

I think you must only focus on NCERT book as questions are asked based on the syllabus from the designated books only. So my recommendation will be to focus on NCERT books only as that can make you score well than referring to other reference books.

Below is the eligibility for B.Sc Agriculture course.
Interested aspirants for the course are required to fulfill the below-mentioned eligibility criteria.
Completion of Intermediate (12 years of school education) in Science stream with Physics, Chemistry, Biology and/or Mathematics as the subjects of study.
Apart from this, candidates possessing Intermediate in Agriculture stream (limited states) are also eligible to apply. Depending on the university, the eligibility varies in terms of a combination of subjects. Eligibility criteria also varies for reserved categories as per the reservation guidelines of GOI.

Hi Aakash, Please find the link below:
https://www.shiksha.com/courses-after-12th/commerce.

Hi,
Please find the link below:
https://www.shiksha.com/hospitality-travel/event-management/colleges/colleges-india.

Hi,
It is advisable to get in touch with the college officials for detailed information as the college website is silent on the same.
http://ksoumysore.karnataka.gov.in/pages/Contact-Us.aspx
Thanks.

If you have completed class 12th with PCM and scored a minimum of 50% marks aggregate, then you are eligible for this course. Also, the minimum age requirement is 18 years.