Science

https://www.shiksha.com/science/colleges/b-sc-colleges-india
Here is the list of the college along with the admission procedure and eligibility criteria, you can follow the link to get all the details.

https://www.shiksha.com/mba/cmat-college-predictor
Here is the tool which you can use to check or get prediction about the college.

https://www.shiksha.com/science/colleges/m-sc-mathematics-colleges-india
Here is the list of the colleges offering M.Sc. In Mathematics. You can refer the link to know all the details like eligibility and fee structure.

https://www.shiksha.com/university/msu-the-maharaja-sayajirao-university-of-baroda-vadodara-37071
Here are complete details of the college along with all the previous cut-off.

Refer the link:
https://www.shiksha.com/humanities-social-sciences/psychology/colleges/colleges-delhi-ncr.

Refer the link:
http://www.du.ac.in/du/uploads/pg-courses/MScGenetics.pdf

Fifteen percent of the seats (30) are earmarked for ICAR Quota over and above 300 seats, for the students from other states. Fifteen percent seats are earmarked for Diploma in Horticulture (2 years) course through HORTICET exam. Candidates who possess the following qualifications are eligible to seek admission.

Doing correspondence will not give you much importance and weightage to the exam.

A grade of 50-59% is lower second class honours, a 2.2 degree, known colloquially as a Desmond, after Archbishop Desmond Tutu, Tutu, get it? And then 40-49% is a third class honours, and under 40% is a fail.

Can you please specify the college you are looking for? Because every college has different rules and procedures to follow.