Science

Bachelor of Business Administration or BBA is a 3-year professional undergraduate course in Business Management, the minimum eligibility for which is class 12th from a recognized educational board with a minimum score of 50%. The course is divided into six semesters and comprises variants like BMS, BBM and BBS. It can also be pursued through Correspondence/ Distant learning modes and admission to the same is based on entrance tests carried out by different colleges and universities.
Some such entrance tests conducted by respective universities for admission into BBA course are:
IPU-CET
NMAT
SET
AIMA UGAT
Eligibility for BBA course
Interested aspirants for the course need to fulfil the below-mentioned eligibility criteria.
Completion of HSC (10+2 level) from a recognized educational board
English as one of the subjects at HSC
Minimum aggregate score of 50% to 60% at 10+2 level of education
Students who have appeared in HSC examination and are awaiting results are also eligible to apply.

You may clear NET exam or some other state entrance and go for lectureship in government colleges, and also in private colleges.
If you like your subject and are interested in research, Ph.D is the way to go. Be it at IIT, IISER, TIFR, IISc and so on. Choose a top class institute and a good guide with whom you would be comfortable to work.
Going for a Ph.D abroad is also a great option, but the choice depends on your circumstances and wishes.
Clearing GATE exam and giving PSU entrances paves the way for government jobs (other than lectureship, said above) too. The salary is good. You can also join as a scientist in government laboratories and institutes like BARC, etc.