If function $f(x)$ is differentiable at $x=a$ then $\lim\limits_{x\to a}\large\frac{x^2f(a)-a^2f(x)}{x-a}$ is

Question

$\begin{array}{1 1}(a)\;-a^2f'(a)&(b)\;af(a)-a^2f'(a)\\(c)\;2af(a)-a^2f'(a)&(d)\;2af(a)+a^2f'(a)\end{array}$

Comments

Can I get the steps plzz...