Let Q = {aa, abaaabb, bbaaaaa, bbbbbbbbbb} and R = {b, bbbb, bbbaaa, bbbaaaaa} Pref (Q in R) is equal to? (A) {b,bbba,bbbaaa} (B) {b,bba,bbaaa} (C) {ab,bba,bbbaa} (D) {b,bba,bbba}â–ºCorrect Option Correct Option is: A