B.Sc

You could take up a number of courses after completing B.Sc in Biology. Some of the subjects you could pursue after completing your course in Biology are as follows:
1) Master of Science in Biology
2) Master of Science in Biological Sciences
3) Master of Science in Applied Biology
4) Master of Science in Environmental Biology
5) Master of Science in Environmental Microbiology
These are only a few subjects you could pursue in M.Sc. from a much broader pool of subjects. I am certain that if you do well in your studies, you will get a respectable package in the industry.

If you are planning to pursue B.Pharm then you should opt for this course.

Yes, you can go for distance education program as there is no need to leave your current job.

Your basic qualifications just provide background. The remaining things are to be added. It depends on your interest, solely. Moreover, training yourself goes on lifelong. You can pursue a management course. Work for a career and you will succeed.

You can do M.Sc chemistry hons in which you will take special branch of chemistry and take lectureship. You can appear for SSC PSC exam.

All fields are good for better future, but I would like to grab your attention towards something which is more important.
If you are planning for going in some engineering field, you will have to gain as much knowledge you can throughout your 4 years of Bachelor's degree.
If you will be proficient in that particular branch then you need not to care about which branch is better.
If there are less opportunity that doesn't mean you should not go ahead and vice versa.
Finally, just analyze your capabilities and take a decision.
It's totally depends on you which will be the bright future.

Hello Harpreet,
Normally speaking, colleges abroad seek excellence in academics before considering any student for admission. Unfortunately, you have scored less than 60 % and hence I feel that your chances have diminished. However, I would advise you to seek guidance from an agency dealing in sending students abroad since that are many nuances and you may fit in perhaps!

Hello Deven,
I fully understand and appreciate your dreams and wishes. But unfortunately IT study needs more than 90% marks for admission. Hence, you will have to really think of something else or seek admission in private colleges through management quota. Many colleges I some states are giving admission for science degree holders.