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In the given figure, $\text{O}$ is the centre of the circle. If $\angle \text{PRQ} = 40^{\circ},$ then $\angle \text{OPQ}$ is :

1. $80^{\circ}$
2. $100^{\circ}$
3. $50^{\circ}$
4. $40^{\circ}$

1
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