CBSE 12th

Yes definitely you can, both are good courses and have a wide scope ahead. You can pursue any one of them which you like.

Please specify the course to which you are applying so that I may be able to populate relevant details regarding your eligibility for admission to that particular course. For a detailed list of all courses offered by this institute, please refer to the link provided below:
https://www.shiksha.com/college/jai-hind-college-churchgate-Mumbai-1199.

Yes, surely you can. There are no restrictions of stream for pursuing B.A. Kathak.

You may go for class 12th from CBSE Patrachar Vidyalaya, because if you do 11th again, it becomes a one year gap and this may cause a problem in your further studies:
https://www.cbsepatrachardelhi.com/
Patrachar Vidyalaya is for those students who have failed in 11th or 12th due to some personal reasons. Please follow up the above link and fill up the inquiry form and collect all reliable information from them
all the best.

Yes, of course, B.Pharma is a good career after 12th science if you are particularly interested in medicines and pharmaceutics.

Candidate must have passed 10+2 from recognized board
admission is based on merit system.
Non-MH general: 92%
MH Gen: 88 to 90 %
MH OBC (non-creamy) : 85% or little less.
MH SC/ST/NT: Can get as low as 50%.
Cutoff depends on each year 12th performance.
All the best.

Students who have passed Class 12 or equivalent examination from any recognised board are eligible to apply.
Admission-Based on Cut Offs
It lies between 55 to 70% for SC/ST/OBC candidates
so you can apply for the same
All the best.

Yes, you are eligible for other details please refer to the below given link
https://christuniversity.in/apply-online#apply_now
All the best.

A pass in the two-year Intermediate Examination of A. P. or +2 Examination recognised as equivalent thereto and with an aggregate of 40% marks (pass percentage for SC &ST candidates) in the concerned Science subjects viz Physical Sciences and Mathematics group or Physical Sciences & Biological Sciences, as the case may be.