Science

Hello,
There are many good MS programs in Canada for computer Science and engineering. Some universities are:
University of British Columbia
University of Waterloo
Mcgill University of Ottawa
To secure admission in Canadian universities, you should have the aggregate of 60 percent and also appear for IELTS and TOEFL exam along with GRE.

Hi Arnab,
To get admitted in St. Xavier's College, Kolkata for B.Com you must have Mathematics in your +2 that is class 11th and class 12th Maths and English are the two compulsory subjects. As far as I know, St. Xavier's University, Newtown which was inaugurated last year provides B.Com degree, even if you don't have Maths. Kindly, check both the websites for further details.

Dear friend,
As per my knowledge and experience, B.Com course is a good course after class 12 with maths stream. B.Com course is a professional course and you can go for further studies like M.Com and any other professional course, you learn so many things in it. You can go for CS, CA like many other courses. Many good universities and deemed university provide B.Com course. So, I suggest you pursue with B.Com course.
Thank you.

Dear Friend,
Can you please tell me you are re-appearing for which exam? If it is for M.Sc. Entrance test, then yes you can apply.
Thanks.

Hello Pradyumna,
It is very nice to see that you have already set a target to yourself of getting employment in NASA or ISRO. ISRO employs people or students from wide range of fields every year. You just keep on observing or keep a watch on the website of ISRO to know about announcement of the vacancies. For NASA, I suppose you will have to go to US for doing your MS and then your chances will improve for getting a job in NASA.

Unfortunately, it is not available in that institute.

IIT, Bombay and IIT, Delhi are good for placements but all the IITs are best for M.Sc chemistry.

Hello,
If you have 55% marks in BSc then you can apply for IIT JAM exam. But, JAM has some eligibility for IIT JAM chemistry: https://goo.gl/F8vLLR exam. Check it first on the official website of JAM and then apply for it.