If x = 1/3 y and y = 1/2 z, then x : y : z is equal to

Answer: Option B

$$\begin{array}{rl}& x=\frac{1}{3}y=\frac{1}{3}\times \frac{1}{2}z=\frac{1}{6}z\\ & Letx=\frac{1}{3}y=\frac{1}{6}z=k\\ & \text{Then,}\\ & x=k,y=3k,z=6k\\ & \therefore \text{x}:\text{y}:\text{z}=k:3k:6k\\ & =1:3:6\end{array}$$