Question

If two sets $A$ and $B$ are such that $(A-B)=A$, then $A\cap B=$

• A. $\varphi$
• B. $A$
• C. $B$
• D. $A\cup B$

Answer 1

The correct option is A $\varphi$

$A-B=A$
$\Rightarrow A-(A\cap B)=A$
$\Rightarrow A\cap B=\varphi$