Science

As you are a student of science, you can choose general science, math, computer science, social science and English. These subjects are learned in B.Ed as method papers. You need not to worry about choosing any subject because each subject covers minimum level of knowledge through which you will learn how to teach a subject in a class systematically.

Please refer to the link provided below for details regarding various courses in Bharathiar University. You should be able to download their brochure which contains important information regarding courses offered by the college. All affiliations and accreditation are mentioned in the brochure.
https://www.shiksha.com/university/bharathiar-university-coimbatore-1475

Simple- successful candidates who have completed B.Sc. in Aviation may go on and become Commercial or Ferry Pilots (in Private or Government sector Airlines, Chartered Flights, etc.). One may also become a Flight Instructor after gaining experience. Average starting salary could be anywhere between 5-12 LPA.
If you are interested in seriously pursuing a course in aviation then it will be the right decision to take admission in one of the reputed flight schools to successfully start your career in aviation.

After completing the course, graduates may get hired at major International or Domestic Airports. Average starting salary is usually between 3-6 LPA. Job roles available are-
Airport Manager
Administrator
Staff Manager
Safety Officer

Some well-known job posts available in front of graduates are-
Research Officer
Quality Assurance Officer
Agriculture Officer
Agriculture Loan Officer (in Banks)
Production Manager
Operations Manager
Farm Manager
Average starting salary is generally between 2-4.5 LPA.

Please refer to the link provided below for an exhaustive list of colleges which offer PG courses in Agri-business. You should be able to navigate to a college of your choice using the filters on the webpage. Additionally, you can also download their brochure which contains details regarding admissions, reviews and rankings, placement information which should help you decide whether you prefer the college to pursue a course in agribusiness.
https://www.shiksha.com/mba/colleges/mba-in-agri-business-colleges-india

The eligibility for Bachelor of Commerce:
The basic eligibility for admission to any of the B.Com programs is mentioned below:
Candidates must clear Higher Secondary School examination from a recognized educational board.
They should have Maths and English as core subjects.
Minimum 50% marks are required at 10+2 level.
Although, candidates from Science and Arts stream are also eligible to apply, those with commerce stream are preferred.
There is no work experience required for the course. However, students with work experience can also apply.

Please refer to the links provided below for details regarding a course in BBA hons from CMR University and Global Institute of Management Sciences. You should be able to compare the features of each college from the web page itself and then decide which college you would prefer to pursue BBA hons.
https://www.shiksha.com/university/cmr-university-bangalore-47389
https://www.shiksha.com/college/global-institute-of-management-bhubaneswar-22009