Is non medical stream a good choice for one who is planning to write IFoS (Forest) exam in future? How much percentage should I score in it?

i am thinking to opt. science non med . can u plzz tell me how much percentage is required for it
and as i want to go in IFS (Indian forest services ) so is science non med is the best option for it
if not den which stream will be best for it
can u tell me plzz thnk u