In the given figure, B O and C O are the bisectors of ∠ B and ∠ C respectively. If ∠ A=50^∘ then ...

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In the given figure, B O and C O are the bisectors of ∠ B and ∠ C respectively. If ∠ A=50^∘ then ∠ B O C= ?
(a) 130^∘
(b) 100^∘
(c) 115^∘
(d) 120^∘

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