If $A$ and $B$ are any two events such that $P(A)= \large\frac{2}{5}$ and $P(A \cap B)=\large\frac{3}{20}$,then the conditional probability, $P(A |(A' \cup B')),$ where $A'$ denotes the complement of A, is equal to :

Question

$\begin{array}{1 1} (1)\large\frac{1}{4} \\ (2)\large\frac{5}{17} \\ (3)\large\frac{8}{17} \\ (4)\large\frac{11}{20} \end{array}$