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In the given figure, PQ is tangent to the circle with centre O. S is a point on the circle such that $\angle SQT = 55^\circ$. The $m \angle QPS$ is
- (a)$55^\circ$
- (b)$20^\circ$
- (c)$35^\circ$
- (d)$70^\circ$
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Sol. (B) $20^\circ$