I'm a B.Pharma student, am I eligible for getting a banker job in MNCs after doing my MBA?

Yes. Jobs post MBA are generally based on the specialisation that you opt for in MBA. With a B.Pharma degree armed with an MBA, you could also look at opportunities in MNC pharma/clinical research / FMCG companies in marketing. You could also look for a career as an Equity Research Analyst In a BFSI

Yes, doing MBA from a good college will get you placed in any of company in the field of marketing and business or any other. All the best.