No, I dont think you should go for further iterations in BITSAT Counselling with a Score of 226. Atleast having scored 240-260, would be still worth a try sitting till the last iteration. Of course, you may secure B.Pharm, incase youre tareting that at either of the Campuses of BITS Pilani. Otherwise, the lowest Cutoff in 2020, was BITS Hyderabad was anywhere around 240 for M.Sc. in Biological Science and Chemistry as well as B.E. Civil and Chemical.