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PBA and PDC are two secants. AD is the d...

PBA and PDC are two secants. AD is the diameter of the circle with centre at O. `angle A = 40^(@), angle P = 20^(@)`. Find the measure of `angle DBC`.

A

`45^(@)`

B

`30^(@)`

C

`60^(@)`

D

`75^(@)`

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The correct Answer is:
B
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