$(A)\;x = \pm \frac{1}{\sqrt 2} , y = \pm \frac{1}{\sqrt 6} , z = \pm \frac{1}{\sqrt 3}$
$(B)\;x = \pm \frac{1}{\sqrt 3} , y = \pm \frac{1}{\sqrt 2} , z = \pm \frac{1}{\sqrt 6}$
$(C)\;x = \pm \frac{1}{2} , y = \pm \frac{1}{ 6} , z = \pm \frac{1}{3}$
$(D)\; x = \pm \frac{1}{3} , y = \pm \frac{1}{2} , z = \pm \frac{1}{6}$