If A and B are two events such that $P(A)=\Large\frac{1}{2},\normalsize P(B)=\Large\frac{1}{3},\normalsize P(A/B)=\Large \frac{1}{4},$then $P(A'\cap B')$ equals

Question

$\begin{array}{1 1}(A)\;\frac{1}{12}\\(B)\;\frac{3}{4}\\(C)\;\frac{1}{4}\\(D)\;\frac{3}{16}\end{array} $