1.

If A ∩ B = then: (A) A – B = Φ (B) A – B = A (C) A ∪ B = Φ (D) A – B = B

Answer»

Answer is (B)

A ∩ B = Φ 

Φ, is common in A and B both. 

So, other elements of A is not present in B. 

Thus A – B = A



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