India

There is so many courses in Delhi for Polytechnic.
Ambedkar Institute of Technology, Delhi
Aditya Institute of Technology
Guru Tegh Bahadur Polytechnic Institute
Polytechnic colleges in Delhi
Aryabhatt Institute of Technology
Pusa Institute of Technology
All the best.

Yes, you can go for M.Sc in geography after BA in geography.

The candidate must have passed the class XII or an equivalent examination from a recognized Board and secured the minimum cut off mark prescribed by the University. Or, with a minimum of 65% marks in aggregate subjects.

Refer to the link below to know about the colleges:
https://www.shiksha.com/humanities-social-sciences/colleges/b-a-colleges-delhi-ncr

Hello Debojyoti,You will agree that your rank is a bit on lower side. However, I am attaching a link that will predict college for you. https://www.shiksha.com/b-tech/resources/wbjee-college-predictor.

Good morning dear,
The best B-school in Dehradun is Doon Business School. It is one of the good institutes in India. Good in terms of academics, return on investment, placements, college facilities etc. The college also gives Scholarship to the students on the basis of merit. Refer to the below link for complete details.
https://www.shiksha.com/college/doon-business-school-Dehradun-26485?q=Doon+Business+School&rf=searchwidget&landing=ilp