Hey

With your rank 72 is TSPGECET and you belonging to OC category your rank would come around 2300 to 2500 whereas to get a seat in OUI in Pharmacy stream you require a rank of around 1000 or less. You as you can see there is less to no chance for you to get Pharmacy stream in OUI. I would suggest you choose some other college to get Pharmacy.  I hope it helped