Science

You haven't quoted your 12th marks without which one can't suggest you suitable colleges. Then also the best colleges for commerce are:
1. College of Commerce, Rajendra Nagar
2. Vanijya Mahavidyalay, PU Campus
3. A. N. College, Boring Road
4. B. N. College, Ashok Rajpath
Apart from that, many tier-2 coll

You can change your subjects from PCM to PCMB. It can be done before board registration for class 12th. You should contact you CBSE board cell or school principal as soon as possible.
Good luck.

Internships is provided plus you get really good placements if you score above 8.5 CGPA overall. This college provides good placements and regular scholarships. Companies like Tata, TCS, Infosys, Wipro and even Indian army, navy and airforce come for placements.

BIT, Bangalore is better for CSE in terms of scope and placement.

Dear Vansh,
Fees for B.Sc (non-medical): INR 40,000 PA

After 12th you can go for the entrance exam of agriculture, i.e. PAT, conducted in every state or you can go for direct admission in a college for B.Sc or B.Tech in agriculture.

Yes, there are many job opportunities after M.Sc and you can even go for teaching profession.