Math Chapter Wise Sets, Relations And Functions English MCQ Rajasthan TGT 2015 Q.If H is a subgroup of a group G and a,b ∈G, then if AHa = Hb iff ab-1 ∈G BHa = Hb iff ab-1 ∈H CaH = bH iff (ab)-1 ∈G DaH = Hb iff ab-1 ∈H Show answer Correct answer: Ha = Hb iff ab-1 ∈H