Science

It is around 5-7k per year and hostel fee is arround 18-20k per year

There are many colleges for B.Sc and B.C.A in Chennai we can list some top colleges for your better understanding. It's you choice which to select there some list of colleges
BCA colleges in Chennai
1. Loyola College, Chennai
2. Womens's Cristian College, Chennai
3. Presidency College, Chennai
4. Stella

There are many Institutes and colleges of B. S. S in Medical Science there some similar colleges of your suggestions
1.Chandigarh University, Chandigarh.
2.University Of Mumbai [MU] Fort, Mumbai
3.DAV College, Chandigarh Chandigarh

1] Take online coaching
2] Prepare short notes for revision
3] Practice previous year question papers
4] Don't skip topics
5] Do work on Chemistry everyday.

To get in Bsc course Fergusson college in pune you have to score atleast 85+ percent,and the 1st list is generally above 90
And the cutoff list of this year is not available on website ,so you have to go to college and check it.

To pursue MCA from Chandigarh University is the best decision. MCA duration is for 2 years, the university is a renowned name and has bagged A+ by NAAC, the university the ranked as top 3rd private university. Chandigarh University offers MCA courses in General, Cloud Computing, Artificial Intellige

It's been around 270 marks and above

Via NEET. You still have to go and check there

Various colleges have various fees structures. You have to be specific about your preference

The exact date was not given.