B.Sc

Kindly visit the link to know more about NDA exam
https://www.shiksha.com/exams/nda-exam.

Yes, you can do, if studied English as a subject at 10+2 level and also obtained minimum 50% of marks at 10+2 level.

You have not written about the colleges, However, the eligibility criteria of M.Sc Statistics of Loyola College Chennai is given below for reference only. Eligibility criteria: A candidate who has passed a Bachelor degree of 3 years duration (B.Sc. or equivalent) with Statistics / Mathematics under 10+2+3 pattern from any recognized university. So B.Sc IT students are not eligible for the M.Sc Statistic course.

Jain University offers B.A. In Psychology. The eligibility criteria is given below. Eligibility : The minimum qualification required to apply is a pass in the 10+2 examination in Science / Commerce / Arts from PUC / ISC / CBSE or equivalent board. Admission criteria JET (Written+GD+PI).

As per the SVU courses list M.Sc Horticulture programme is not available here.

JNU does not offer B.Sc courses. JNU offers only Language courses in Undergraduate mode.

There are no colleges in Tamil Nadu offering a B.Sc Genetics course.

There is no any college offering B.Sc Meteorology course in Tamil Nadu.

On the basis of your rank, the admission chances for B.Sc Agriculture are very low.

The following are the Colleges in Tamil Nadu offering the B.Sc Biotechnology course:
1. Guru Nanak College Chennai
2. The New College Chennai
3. Mohamed Sathak College of Arts and Science Chennai
4. Vels Institute of Science, Technology and advance studies Chennai.