Sir iam a student of pharm D i got admission through convener quota. Im nt satisfied with it if i get mbbs in neet ug 2019 should i have to pay 6 year fee to my pharmacy college or not

Of course you will be eligible to take NEET 2019. There is no issue. It would have been good if you had taken this decision before. As you have already taken admission to B.Pharma college and if you get seat in MBBS seat through NEET then they may not refund your fees amount that you have paid at the time of admission. Most of the colleges that I have seen won't refund the fees at any circumstances. If you are fine with this then go for NEET 2019.