Question

If $A$ is subset of $B$, then $BUA$ is equal to

• A. $B\cap A$
• B. $A$
• C. $B$
• D. None of these

Answer 1

The correct option is C

$B$

Explanation for the correct option:

Find the value of $BUA$:

Given that, $A$ is subset of $B$ that means $A\subseteq B$

$\Rightarrow$Every element of $A$ is an element of $B$.

$\therefore$the union of elements of sets $A$ and $B$ are $\mathit{B}\mathbf{}\mathbf{\cup }\mathbf{}\mathit{A}\mathbf{}\mathbf{=}\mathbf{}\mathit{B}$

Hence, Option ‘C’ is Correct.