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PA and PB are two tangents to a circle with centre O from a point P outside the circle.A and B are points on the circle. If `angle OAB =35^@` than `angle APB` is equal to:
PA और PB केंद्र O वाले एक एक वृत्त की दो स्पश्रिखाएं हैं जो वृत्त के बाहर स्थित बिंदु P से निकली हैं |A और B वृत्त पर स्थित दो बिंदु हैं | यदि कोण `angle OAB =35^@` है, तो कोण APB किसके बराबर होगा ?

A

a)`70^@`

B

b)`20^@`

C

c)`25^@`

D

d)`35^@`

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