Math Chapter Wise Topology English MCQ Rajasthan TGT 2015 Q.If (X,d) is a metric space and A,B∈X, then the correct statement is- AA is an open set. BA is closed if and only if is A A = CA B A B/∪ ≠ ∪ DA B A B/∪ ≠ ∩ Show answer Correct answer: A is closed if and only if is A A =