Solve this : 53 . In the figure , O is the centre of the circle . Then , which of the following is true ? ( a ) ∠ x + ∠ y = ∠ z ( b ) ∠ x - ∠ y = ∠ z ( c ) ∠ x = ∠ y + 2 ∠ y ( d ) None of these Share with your friends Share 0 Neha Sethi answered this Dear student Regards 0 View Full Answer