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In figure, sides AB and AC of a `Delta ABC` are produced to P and Q, respectively. The bisectors of `lt PBC` and `lt QCB` intersect at O. Tnen. `ltBOC` is equal to

A

`90^(@) - (1)/(2)ltBAC`

B

`(1)/(2)(ltPBC + ltQCB)`

C

`90^(@) + (1)/(2) lt BAC`

D

None of the above

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The correct Answer is:
A
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