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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 within the triangle. If `angle BOC =156^@` , then the measure of `angle A` is:
`triangle ABC` में, `angle B` तथा `angle C` द्विभाजक त्रिभुज के भीतर बिंदु O पर मिलते हैं | यदि `angle BOC =156^@` है, तो कोण A का माप ज्ञात करें |

A

a)`66^@`

B

b)`132^@`

C

c)`84^@`

D

d)`156^@`

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