If $p\neq a,q\neq b,r\neq c$ and $\begin{vmatrix}p&b&c\\p+a&q+b&2c\\a&b&r\end{vmatrix}=0$ then $\large\frac{p}{p-a}+\frac{q}{q-b}+\frac{r}{r-c}$=

Question

$\begin{array}{1 1}(A)\;3&(B)\;2\\(C)\;1&(D)\;0\end{array}$