hiii Akhand ,

For M.Sc. botony program in BHU , every year cut off chances . Cut off decided by according to rank of student . Different category have different cut off . As you not mentioned your category here . 

You need to visit for cut off detail - https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/articles/bhu-pet-cut-off/amp&ved=2ahUKEwj1kt-xncPjAhUj8XMBHevXAzkQFjAAegQIAhAB&usg=AOvVaw3Fws9cf1mNJwzCL5XX4XwZ&ampcf=1

hope it help!