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In a triangle ABC, the bisectors of angl...

In a `triangle ABC`, the bisectors of `angle B` and `angle C` meets at point O inside the triangle. If `angle A` is given, then which among the given option is true ?
`triangle ABC` में, `angle B` तथा `angle C` द्विभाजक त्रिभुज के भीतर बिंदु O पर मिलते हैं | यदि `angle A` दिया गया है, तो निम्न में से कौन सा विकल्प सही होगा ?

A

`angle BOC=90^@ + (angle A//2)`

B

`angle BOC=180^@ - (angle A//2)`

C

`angle BOC=90^@ -(angle A//2)`

D

`angle BOC=180^@ + (angle A//2)`

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