Give me the correct answer and I'm confused that what's the difference between e and f?

Let P (n; m) be the statement h divides m", where the domain for both variables is the positive integers. By' n divides m" we mean that m kn for some integer k. Which ofthese statments is true: (a) P (4 5) (b) P (2; 4) (d) 3m Vn P (ni m) (e) In Vm P (n; m)