Math Chapter Wise Modern Algebra English MCQ TGT 2011 Q.A subset H of a group (G, *) is a group if and only if. Aa, b∈H ⇒a*b∈H Ba∈H ⇒a–1/∈H Ca, b∈H ⇒a*b–1 ∈H DH ceW FkeâeF& DeJeÙeJe nw Show answer Correct answer: a, b∈H ⇒a*b–1 ∈H