Hii sandip
Every course has its merits and demerits so let me explain you the difference between both the courses, d pharama is diploma course of 2 years after you completed your 12 in science stream, you can finish the degree and have your own medical store or get a job of sales person etc with this you can earn easily 10000-15000 per month while b. Pharma is a 4 year professional course and a better option and will provide you a bachelor degree after that you will be eligible for higher education like m.Pharma etc and you will be also get better pay. I hope this information helps you.
Thank you