CBSE 12th

Hello Biswajit,
Yes, you are eligible to appear for JEE Mains. Remember, max three attempts for JEE Mains and max two attempts for JEE Advanced.

The top B-schools that still continue to higher mainly on the basis of scores attained in entrance tests are:
1. IIFT New Delhi and Kolkata
2. FMS New Delhi
3. NITIE Mumbai
4. JBIMS, Mumbai
5. NMIMS, Mumbai
These B-schools require 50% and above in the UG and class XII and excellent scores in the respective entrance tests to secure admission.

After passing class 12th, you are eligible to join Indian Air Force.
You have to appear in NDA Exam to join Indian Air Force.
NDA:- National Defence Academy
This exam is organized by UPSC twice in a year as NDA I & II.
UPSC:- Union Public Service Commission
Eligibility Criteria for Air Force:-
You should be 12th passed from recognized school/board.
You must pass class 12th with Physics, Chemistry & Maths.
Your age should be in between 16.5 to 19 years.
You must have an Indian citizenship.
Only unmarried male candidate can join Air Force through NDA.

You can go for:
Bachelor of Commerce (B.Com)
Bachelor of Management Studies (BMS)
Bachelor of Business Studies (BBS)
Bachelor in Business Management/Administration (BBM/A)
Master of Commerce (M.Com)
Master in Business Administration (MBA)
Business
Operations
Finance
Marketing
Banking
HR
Chartered Accountancy (CA)
Chartered Financial Analyst Program (CFA)
Company Secretary Program (CS)

BE/B.Tech or equivalent qualification in first class with an aggregate minimum of 65% marks or CGPA 6.84/10 (average of all semesters for which results are available). A minimum of 65% marks or CGPA 6.84 in section B alone for candidates with AMIE/Grad IETE qualification.

You need to select the commerce subjects in SSC. Here we are providing you with the list of subjects for 10+2 commerce:
Accountancy
Economics
Mathematics
Business
Finance
Business economics
Cost accounting
Income tax
Auditing
Business finance
Marketing
Business law