Let $f:N\rightarrow R$ be the function defined by $f(x)=\frac{2x-1}{2}\;and\;g:\;Q \rightarrow R$ be another function defined by g(x)=x+2. Then $(g\;o\;f)\frac{3}{2}$ is

Question

$\begin{array}{1 1}(A)\;1 & (B)\;1\\(C)\;\large\frac{7}{2} & (D)\;none\;of\;these.\end{array}$