MBA/PGDM

This will depend on your long term career aspirations. If you intend to return to India then it doesn't give you an advantage of doing MBA from UK.
The cost of MBA in UK is also on the higher side and the laws there don't encourage working permits post completion of the program.
In case you intend to migrate overseas then Canada, Australia and USA are better markets for pursuing MBA as the government there are open to issuing of work permits.

Dear Pradeep,
Yes, absolutely you need an excellent managerial post-graduation work experience (at least 2-3 years) to apply for university in UK particularly London Business School. This work experience should not include your internship months.

Dear Akshata,
If you see the requirement notice it is clearly shown that "Candidate are required who have MBA/PGDM" (in your case it's PGDFM). So both the courses are more or less the same. So there is no question for 'which is better'? But from my knowledge the market demand of MBA is slightly above then PGDM because MBA is a professional degree course and PGDM is just diploma course. This is the only difference. So based on that fact you can choose your career.

Dear Shubham,
There is no specific criteria for BBA students. Process is same for all Bachelors. After BBA, focus on some major MBA entrance exams like CAT, GMAT, MAT, CMAT, etc. Try to build up your profile and gain practical knowledge from industries also.

Dear Peerzada,
The procedure is all based on your eligibility. So please apply only if you are eligible. To apply for MBA abroad the basic requirement is: Having exceptional score in GMAT, IELTS/TOFEL and your graduation. Then you have to qualify their essay writing test followed by personal interview (GD/PI). You have to submit at least 3-4 LORs. And the most important requirement is the work experience. It is very much desirable that you must have at least 2-3 year of managerial work experience post-graduation. It's give you edge over other students. Rest depends on your caliber.

I have very limited knowledge of the same. Therefore, I would request you to look at HRD's rankings, Times of India and Hindustan Times rankings.