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A chord $QR$ subtends an angle of $105\degree$ at the centre $O$ of the circle. The measure of $\angle RQP$ is
- (a)$\frac{75\degree}{2}$
- (b)$\frac{105\degree}{2}$
- (c)$75\degree$
- (d)$15\degree$
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Answer (B) $\frac{105\degree}{2}$