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A,B and C are three points on a circle s...

A,B and C are three points on a circle such that the angles subtended by the chord AB and AC at the centre O are `110^@` and `130^@` respectively. Then the value of `angle BAC` is:
A, B और C एक वृत्त पर स्थित तीन ऐसे बिंदु हैं कि जीवा AB और AC के द्वारा केंद्र O पर अंतरित किये गए कोण क्रमशः `110^@` तथा `130^@` हैं| `angle BAC` का मान है :

A

`70^@`

B

`75^@`

C

`60^@`

D

`65^@`

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