B.Tech

Hello,
BIT Sindri is not very much known for its high end packages, but for your clearance average package is around 3.5 lakhs.

Hello,
BVPCOE Pune is a good college to pursue engineering, it got 66 rank in NIRF 2017 ranking, placement cell is also well oiled there so you may consider this college, and as far as preparation is considered NCERT books are enough to crack it and question paper consists of only physics and maths a

Firstly, OBC is not a caste, it’s a category. Quickly coming to your answer part, yes, you can get admission in Maharashtra colleges with your JEE marks.

JECRC will be best among the given options. SKIT is also a very good college.

Hello,
Here are some best colleges in Kolkata for biotechnology:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/colleges/b-tech-in-biotechnology-engineering-colleges-kolkata&ved=0ahUKEwiZ-dqku9TTAhXFuI8KHW4vBd8QFgiAATAE&usg=AFQjCNEwn23-B6nSwGAc1mzzIjdfe4ZKdA&sig2

Hello,
As per your rank in JEE chances of NITs are very slim for you, however you may apply to IIITs, LNMIT and Thapar University for any positive outcome.

No, 63 marks are too low to get even in a B-grade college, either you should accept a favorably average college and focus on area of presentation skills, better performance in academia and emerge out or wait for another year and prepare well.