2 wires of equal length are suspended.$Y_1=2\times 10^{11}N/m^2$ and $Y_2=3\times 10^{11}N/m^2$.Find equivalent young's modulus of combination,$Y$

Question

$\begin{array}{1 1}(A)\;4\times 10^{11}N/m^2\\(B)\;5\times 10^{11}N/m^2\\(C)\;1\times 10^{11}N/m^2\\(D)\;8\times 10^{11}N/m^2\end{array}$