what are the options after doing bsc physical science?or or b.sc in physics ?or b.sc maths?

From the option given by you, one of the best advise will be complete the M.Sc in the field from which you are doing the graduation and than you may do PhD. So, after PhD, you can concentrate yourself in research field or you may join the college as lecturers. If you are interested in the field of M

dear teaching is best option after bsc