I work in a pharma co. as a purchase officer. I have done materials mgt from Indian Institute of Materials Mgt. Which MBA course is suitable for me ?

You have already dome Materials Management course and that should be sifficient. if you want to do more specializatin courses then it would be better to do it in TQM - Total Quality Management. In a Pharma company this would help you and you might find a place in their audit team.