In $$\triangle$$PQR , S is a point on the side QR such that $$\angle QPS =  \frac{1}{2}\angle PSR$$, $$\angle QPR =78^{\circ}$$ and $$\angle PRS = 44^{\circ}$$. What is the measure of $$\angle$$PSQ?

A

$$68^{\circ}$$

B

$$56^{\circ}$$

C

$$58^{\circ}$$

D

$$64^{\circ}$$