M.Sc Botany

Best central universities in India to study M.Sc. Botany are mentioned below:
1) Miranda House, Delhi University
2) Fergusson College, [FC] Pune
3) Hindu College, Delhi University
4) Sri Venkateswara College, Delhi University, New Delhi
5) Hans Raj College, Delhi University
6) Ramjas College, Delhi University
7) Ramnarain Ruia College, [RRC] Mumbai
8) St Wilfred's PG College, [SWPGC] Jaipur
9) St. Teresa's College, [STC] Cochin
10) Sacred Heart College, [SH] Kochi
Regards.

Please apply directly to the college for admission to M.Sc. Botany by filling the registration/application form for 2018. Eligibility criteria to apply for admission is mentioned below:
ELIGIBILITY CRITERIA:
Candidate should have passed Bachelor's Degree in the relavant field obtained through the (10+2)+3 system or an equivalent qualification from the recognised University or equivalent to it. He/She should obtained a minimum aggregate of 55% marks. All SC/ST candidates are eligible for the relaxation of 5%. Regards.

National Eligibility Test, which is conducted by the University Grants Commission for the lectureship jobs in central government colleges, does not have Botany or Zoology as one of the subjects. This, I believe has lead to confusion for you regarding the subject. The answer to your questions is pretty simple. You will have to choose 'Life Science' as the subject for the CSIR UGC NET entrance exam. Regards.

Yes, after getting your graduate degree, you can easily take admission in M.Sc chemistry or botany.

Please refer to the link provided below for details regarding M.Sc course in Wisdom School of Management. You should be able to download their brochure which contains details of availability of courses from this institute.
https://www.shiksha.com/science/course/m-sc-wisdom-school-of-management-lucknow-120692