The value of $\begin{vmatrix}x&p&q\\p&x&q\\p&q&x\end{vmatrix}$ is

Question

$\begin{array}{1 1}(a)\;x(x-p)(x-q)\\(b)\;(x-p)(x-q)(x+p+q)\\(c)\;(p-q)(x-q)(x-p)\\(d)\;pq(x-p)(x-q)\end{array}$