Question

The pairs of rectangular co-ordinate planes have equations

• A. $xy=yz=0$
• B. $x=y=z$
• C. $xyz=0$
• D. None of these

Answer 1

The correct option is A

$xy=yz=0$

Explanation for the correct option

We know that the pair of rectangular co-ordinate planes have the equations

$xy=yz=zx=0$

So, $xy=yz=0$

Hence, option $\left(\mathrm{A}\right)$ is the correct answer.