Science

I can give you two choices: one is traditional, another is exciting and unconventional.
Traditional options:
1. Opt for Engineering. Most suitably go for IITs and other top most institutes through JEE.
2. You can opt for B.Sc in PCM as well after completing graduation, you can appear in any govt. job exam or you can opt for M.Sc
3. For M.Sc, you can go through IIT JAM Exam.
Unconventional Choices:
1. Graphics designer
2. Architecture
3. Games Designing or Animation.
4. Research in Computers and allied fields.
5. Join NDA and contribute in Indian Military forces.
6. Merchant Navy
7. Most exciting job is commercial pilot. It is a perfect blend of good job with great responsibilities.
8. Cinematographer
9. Cartoonist
These career choices are in our minds as a kid but growing up we are told to opt for career paths that are widely accepted. Not every one wants to be a person following the rat-race.

I am not sure about physics, but surely you can combine maths with your humanities subject. If you have economics in your humanities subject then maths as an additional subject can definitely prove to be a boom for you. Knowledge of core mathematics is highly necessary for understanding the advance theorems of Marco-Micro economics. When it comes to the understanding the concept of consumers producer behaviours, price determination, revenue recognition, etc., you must have the knowledge of matrices, differentiation & integration, statistics and probability. These concepts help a lot while having an advanced and realistic knowledge of economics (as a part of humanities). So, in this way, we can relate the subjects of maths and economics. Here, physics may not help you much (since physics is the application of mathematics in the practical world), but it may help you to enhance your mathematical calculation skills. Hope this helps.
Best of luck.