Find the missing no :$\large\frac{1}{2},\frac{1}{4},\frac{2}{8},\frac{3}{16},\frac{5}{32}$________

Question

$\begin{array}{1 1}(A)\;\large\frac{8}{64}\\(B)\;\large\frac{9}{45}\\(C)\;\large\frac{10}{64}\\(D)\;\large\frac{12}{42}\end{array} $