Computer Science Eligibility

It's difficult to get CSE in IIITs, but you can get other branches. To know more use the college predictor tool, https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Yes, you are eligible to take admission for B.Tech Biotechnology.

No, in order to pursue BCA or B.Sc in CS you should complete your 12th with PCM as subjects, then only you will be eligible to apply for those courses.

Know your college admission chances based on your JEE Mains rank, home state, caste, gender, etc., here:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Eligibility for pursuing M.Sc (Geography) is a pass in B.S (Geography) (3-years) from a recognised university. So, you are not eligible for the same.

With this rank, you cannot get. You have at least 85k rank.

Yes, you are eligible for the same course. You can get admission. Good luck.

Kindly predict your college in this college predictor. JEE Main rank predictor is an online tool which predicts the candidates rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs, and other SFTIs.
The rank predicted might not be accurate but it certainly does give an idea to the aspirant.
Know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc here https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor