# If A={5,6,7} and B={}. Then which of the following is true? Option 1) $A\cap B= A$ Option 2) $A\cap B= B$ Option 3) $A\cap B= A\cup B$ Option 4) $A\cap B= U$

H Himanshu

As we learnt

OPERATION ON INTERSECTION -

φ A = φ

-

Since B=φ

B = φ. i.e. A  B = B

Option 1)

$A\cap B= A$

Option 2)

$A\cap B= B$

Option 3)

$A\cap B= A\cup B$

Option 4)

$A\cap B= U$

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