Accounting

For CS and civil both have maths up to 3 semesters. But CS has more maths in the later semester as compared to civil. Don't fear from maths. Choose according to your choice. If you go for BBA there is much less maths than B.Tech.

Kolkata too has good faculties and institutions for your support. Delhi would have an advantage of being the capital city.

Dear Sushma,
We offer M.Com in financial analysis. To apply online click on: https://portal.theaims.ac.in/

Here are some courses which a commerce student can do:
1. Bachelors of Commerce (B.Com)
2. Bachelors of Commerce (Honours) or B.Com (Hons)
3. Bachelors in Economics
4. Bachelors of Business Administration (BBA)
5. Bachelor of Management Studies (BMS)
6. Chartered Accountancy (CA)
7. Company Secretary (CS)
8. Cost and Management Accountant (CMA)
9. Institute of Actuary of India (IAI)
10. Certified Financial Planner (CFP)
11. Bachelor of Law (LLB), etc.

B.Com takes 3-year to graduate. CA takes minimum 4.5 years, CS takes 4 years and CMA also takes 4 years.

No, definitely no. There is no age boundary in ICWAI examination. Also, CA, CS infact a man completed CA as it's the last wish to become a chartered accountant.

They will give offer by taking interview selection.

MBA in Finance is what I would recommend you. You are a very bright Student and Management Education will be a stepping stone in your professional growth.