If HCF of p and q is x and q = xy, then the LCM of p and q is = ?

Answer: Option D

$$\begin{array}{rl}& \text{Product of numbers}\\ & \text{ = HCF}\times \text{LCM}\\ & \Rightarrow pq=x\times \text{LCM}\\ & \Rightarrow \text{LCM}=\frac{pq}{x}\\ & =\frac{p\left(xy\right)}{x}=py\end{array}$$