See, 230 marks is a decent score in BITSAT, but when it comes to securing a seat in any of the three campuses of BITS Pilani, then this is a tricky game. 230 marks for sure won't fetch you some top branch any of the campuses, but if you definitely want to go for BITS, then I would suggest you to seek Pharmaceutical branch anywhere you can get, as this branch closes the last in all three campuses and you have a high chance of getting it.

Hope I have answered your question. All the best!