17. let h is smallest subgroup of d(a.p)|a" =e.f =e,b-a = a' -b} such that h contains x, y then h is normal in dif. (a) x =a,y=a'ß (b) *=a,y=a'p (c) x=a",y= aß

17. Let H is smallest subgroup of D(a.P)|a" =e.f =e,B-a = a' -B} such that H contains x, y then H is normal in Dif. (a) x =a,y=a'ß (b) *=a,y=a'p (c) x=a",y= aß (d) x=a,y=e T ROA