Question

Assertion (A) Let $A=\{1,2,3\}$ and $B=\{1,2,3,4\}$. Then, $A\subset B$.
Reason (R) If every element of $X$ is also an element of $Y$, then $X$ is a subset of $Y$.

• A. Both A and R are correct; R is the correct explanation of A
• B. Both A and R are correct; $R$ is not the correct explanation of $A$
• C. A is correct; $R$ is incorrect
• D. $R$ is correct; $A$ is incorrect

Answer 1

Answer: (A)

Since, every element of $A$ is in $B$, so $A\subset B$.
$\therefore A$ is true. Also, $R$ is true and a correct explanation of $A$.