B.Sc Scope

of course yes as a graduate you are eligible to join Indian Navy but only after qualify in the requisite entrance examination and to fulfill the other criteria.

Hi
Marine biology in india has just arrived but is very promising. With 7500 km of coastline, there is plenty to explore. Read about the career as marine biologist here.
http://www.youngbuzz.com/careers/careerdetail/marine-biologist

Yoga is becoming very popular world wide after UNO celebrating World Yoga Day. You can become independent yoga instructor or paid yoga instructor at yoga / health centres. If you enhance your skills by learning some alternate medical techniques with yoga, you can make decent living.

BSc IT is a basic graduation degree equivalent to BCA with more emphasis on Computer Science theory. You can start your IT career in IT industry with BSc IT as junior developer or tester with small companies as major IT companies prefer BTech CS. You will be required to do MSc for good career opportunities.

There is no such specialization in India based on my knowledge. but MBA pharma, general mba which helps to enter in biotech industry.

At the time market is very bad so if u take admission u have to work very very hard.

I think MBA is better option as u have done bachlers in industrial science. Nd after MBA u may get a job lyk management of a factory or industry

If you lyk management then go for MBA
If you lyk research then go for MSC