B.A

Hi,
Yes, you can go for B.A. LL.B after your 12th with bio sciences. The eligibility for B.A. + LL.B. Hons. In most of the top universities is pass with 60% aggregate marks in 10+2 and you might have to clear some entrance test of the university (depending upon the university you want to take admission in).
It will be advisable if you do your degree from a well-known university and that provides prime placement opportunity, outstanding exposure and professional enhancement training. I can enlist some universities for your help-
Lovely Professional University, Auro University-Surat
Banasthali Vidhyapeeth-Jaipur
GLS Law College-Ahmedabad
Institute of Law, Kurukshetra University – Kurukshetra
These universities provide extensive learning programs and exposure to the students. They also provide worthy scholarships to its students depending upon the entrance test taken of the university or board result.

Yes, you can do MA after completing BA. You only need Bachelor's degree in arts stream for taking admission in MA Sanskrit.
Academic options:
Upon successful completion of the course, postgraduates interested in further studies in the discipline may go for pursuing MA in Sanskrit literature, B.Ed or PhD in Sanskrit or Masters in mass communication and journalism with specialisation in Sanskrit Patrakarita.Other options include pursuing Postgraduate Diploma in Functional Sanskrit and Translation, or Post-Graduate Diploma in Sanskrit Journalism. Rashtriya Sanskrit Sansthan also offers such postgraduates the option of taking vocational training in Sanskrit short-hand and typing and cataloguing manuscripts.

Step 1 Registration:The candidates will have to enter their personal details to register themselves. The application number will be generated during registration.
Step 2 Fill Contact and Communication Details:Detailed address of the candidate has to be filled.
Step 3 Qualification Details:The candidates will have to enter their academic and qualification details.
Step 4- Uploading Documents-The candidates need to upload their photograph and signature or they will also be able to send the soft copy through email in thr prescribed format and dimension.
Step 5 Selection of Course and Payment of Fees:Next, the candidates will be required to select their course, exam cities and more. Payment of fees will have to be done through net banking/credit card/debit card or through Demand Draft. The application fee is same for all category candidates
Step 6 Confirmation and Submission:After submitting the application form, the candidates will have to send the print out to the following address:
The Director,
Admissions, Manipal University,
Manipal 576104