If A and B are sets and A∪ B= A ∩ B, then

1.	If A and B are sets and A∪ B= A  ∩ B, then
A.	A = Φ
B.	B = Φ
C.	A = B
D.	none of these
Answer» D. none of these

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&nbsp; If&nbsp;A&nbsp;and&nbsp;B&nbsp;are&nbsp;sets&nbsp;and&nbsp;A&cup;&nbsp;B=&nbsp;A&nbsp;&nbsp;&cap;&nbsp;B,&nbsp;then

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If A and B are sets and A∪ B= A ∩ B, then