B.Com

If you have completed your graduation, then you can pursue Masters in any course of your interest. Otherwise, you can pursue Masters in the same course in which you have done Bachelors. Admission forms are available for admission in different courses for the session 2017-18 in different colleges, so you can apply for any course of your interest.

I would suggest you for BCA. For its more wide option, you can trust UEM, Kolkata. For best college for your preferred course for its placement record and education, you can visit:https://www.shiksha.com/university/university-of-engineering-and-management-kolkata-47398 to get good understanding of the college

Both the courses have different perspective. If you want to get only to into the management and administration side of it then BBA in Aviation is better. And if you want to work in the finance, taxation, and accountancy sectors of the aviation industry then go for B.Com Aviation. The two countries you mentioned have limited job prospects for international students especially UK. They do not give work permits easily and prefer local candidates only. You must aim for an MBA and gain some work experience if you want to work abroad.

Hello Abhijeet!
You can pursue MBA in any among the following streams: Finance, Marketing, HR, Operations, IT/Systems, International Business, etc. as per your interests and career goals. Being a commerce graduate, Finance is probably the best option for you. https://www.shiksha.com/mba/articles/top-5-mba-specializations-in-india-blogId-3223 Kindly visit this link for more details.

Dear,
This field is interesting and challenging with good income too. If you have a good management skill, communication skill, convincing skills and specially like to organize big events, then this is a good field for further growth.
All the best.

There is no good MBA college which gives admission only on the basis of one's graduation scores. You need to compulsorily give one or the other entrance exams(among CAT, XAT, SNAP, NMAT, etc) whose scores are accepted by that college as well as appear for their further interview rounds(if selected).

Yes, it is helpful as you study economic and business Studies in this graduation course and it is helpful in the preparation for UPSC exam and while completing your graduation you may join coaching for UPSC.

You are not eligible for MBA as well as PGDM and you can't get admission for the same course in a good college because your percentage is very low.