Please guide me on the above qns, give explaination if best, thanks alot

Which following statement about loop is true? Loop structures using the keywords for or while are post-test and can implement pre-test loop. Loop structures using the keywords for or while are post-test and cannot implement pre-test loop. Loop structures using the keywords for or while are pre-test and can implement post-test loop. Loop structures using the keywords for or while are pre-test and cannot implement post-test loop