In the sum of two angles is $135\textdegree$ and their difference is $\frac{\pi}{12}$. Then the circular measure of the greater angle is :
[A] $\frac{\pi}{3}$
[B] $\frac{5\pi}{12}$
[C] $\frac{2\pi}{3}$
[D] $\frac{3\pi}{5}$