Question

If $a$ and $b$ are two variables and $(a,b)=(b,a)$, then

• A. $a=0$
• B. $b=0$
• C. $a=b$
• D. $a\pm b$

Answer 1

The correct option is C $a=b$

$(a,b)=(b,a)$ only if $a=b.$.

So, option C is correct.