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AB is diameter of a circle with centre 'O'. CD is a chord which is equal to the radius of the circle. AC and BD are extended so that they intersect each other at point P. Then find the value of `angleAPB`.

A

`30^@`

B

`60^@`

C

`90^@`

D

`120^@`

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B
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LUCENT PUBLICATION-CIRCLE AND ITS TANGENT LINES-EXERCISE 8B
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