Question

If $A-B=\varphi$, then relation between A and B is

• A. $A\ne B$
• B. $B\subset A$
• C. $A\subset B$
• D. $A=B$

Answer 1

Answer: (C), (D)

The correct options are
C $A\subset B$
D $A=B$

If $A-B=\varphi$

Then either $A=B$ which means all elements in $B$ is same as in $A$.

Or, $A\subset B$ i.e $A$ is a subset of $B$ and elements of $A$ are in $B$.