1.

In the given figure, \[\angle PQR={{120}^{o}},\]where P, Q and R are points on a circle with centre Then \[\angle OPR\]is ____.

A. \[{{20}^{o}}\]
B. \[{{10}^{o}}\]
C. \[{{30}^{o}}\]
D. \[{{40}^{o}}\]
Answer» D. \[{{40}^{o}}\]


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