B.Sc

The Aviation sector has been providing numerous job opportunities to graduates in India. In the past, in case of India, there weren't many courses that focused on the aviation sector and groomed students to take on roles in that sector. Usually, Graduates of any discipline used to apply for aviation jobs. They used to get trained after they were selected after an interview.
B.Sc. Aviation graduates have different career paths and opportunities available in front of them. Prominent job roles available in front of them (within the aviation industry) are
Pilot (must possess CPL)
Flight attendant
Air Traffic Controller
Aircraft maintenance professional
Cargo manager
Airport ground duty manager
In short, one may join any of the above mentioned sectors (within the aviation industry) after completing B.Sc. Aviation course. For becoming a pilot, one must successfully complete flying training though!

Marine engineering is a field that deals with the engineering aspect of the maritime industry. Like any conventional engineering course, marine engineering is a four year course which prepares an individual to become an engineer on ships.
Marine engineering is all about machinery on ships, boats, yachts, or any sea going vessels. There are several other technical streams that sprout out from this field. The curriculum of the course focuses on teaching specialized knowledge of both theoretical and practical marine and mechanical engineering. Greater importance is given to impart skills and competencies that are required to operate and maintain machinery on board ships.
The subjects taught in the first and second year of the course are almost the same as those taught in conventional mechanical engineering. The main aim is to introduce engineering sciences to the students and to make them understand the applications of those sciences in various aspects of marine engineering.
Nautical Science
While marine engineering makes an individual a ships engineer, nautical science prepares a person to become a deck officer. Nautical science is a three years course after which the student joins a ship as trainee cadet officer. After completing sufficient time at the sea and clearing required competency exams, promotion is given to the officer.
Nautical science imparts nautical technology knowledge which is important to become a deck officer on board ships. Theoretical and practical knowledge required for navigation, cargo operation, and ship maintenance and operation is imparted during the three years course, along with exposure to some areas of humanities and social sciences. Hands-on training is extremely important as a deck officer and thus detailed procedure and maintenance techniques of importance deck machinery is an integral part of this course.

There are jobs available in various other sectors for the graduates of B.Sc Mathematics. These sectors are given below
Software
Insurance
Market research
Banking sector
There are also jobs available for these graduates in government sector. Various exams are conducted by UPSC every year for recruiting these graduates to several posts. Some of those exams are given below
Tax Assistant exam
Statistical Investigator exam
Grade III & Compiler Exam
Combined Graduate Level Exam
Most popular career option after B.Sc Mathematics is teaching. There are plenty of colleges available in India which provides various courses in Mathematics. So it is easy to get job in this field. For that reason this career option is popular among the graduates of B.Sc Mathematics.