Science

While choosing a course, students need to consider many elements, including the type of environment they would like to live in, location, transport links, availability of accommodation, cost of living, options for financing studies through institutional scholarships and, of course, the type of institution they prefer.

Just go through this link and fill out the required details:
https://www.shiksha.com/college-predictor

For medical field, biology is preferable.

It totally depends upon your interest as both are different fields.

Hi,
Diploma in Agriculture is a 2 year full-time Diploma course in Agriculture. Every college and university has its own eligibility criteria, admission process, fees structure, and syllabus for this course. The minimum eligibility for the course is class 10th passed with 50% marks from a recognised board.

Graduation degree can only be pursued after 12th. Hence first your brother should complete his formal schooling, i.e. 10+2 or PUC.

The last year's 2019-20 cutoff for B.Sc. Hons Mathematics in general category at Miranda House Delhi was 96.5. 100% of weightage is given to PCM marks if theory and practical components are in 70% and 30% ratio. Hence yours chances are very less.