In the given figure, \[\angle PAD={{30}^{o}}\] is inscribed in a circle with centre O. If the length of the chord YZ is equal to the radius of the circle, then \[\angle CPA={{45}^{o}}\] =____

• A.  \[\angle CBP\]                        
• B.  \[{{105}^{o}}\]
• C.  \[{{115}^{o}}\]                              
• D.  \[{{135}^{o}}\]