Suppose (ab)" = a'bn for all a, b e g wheren> 1 is a fixed integer. then (ab)-1 = b-1 an-1 i) abn-1= b-1an (ii) (aba-'b-1)nn-1) = e for all a, b e g (a) i and i

Suppose (ab)" = a'bn for all a, b e G wheren> 1 is a fixed integer. then (ab)-1 = b-1 an-1 i) abn-1= b-1an (ii) (aba-'b-1)nn-1) = e for all a, b e G (A) I and II only (B) Il and Ill only (C) I and Ill only (D) 1, II, Il are true