The eligibility to apply for forensic science at PG level may vary college to college. Some universities may conduct an entrance test and others might not. So if you want to know for any specific college then you can mention.

In case you plan to do M.Sc in Forensic Science, in general, one is required to have Bsc degree in Physics, Chemistry, Zoology, Biochemistry, Botany etc. The minimum percentage criteria may vary college to college.

Good Luck.