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Let A be the centre of the circle `x^(2)+y^(2)-2x-4y-20=0`. Let B(1,7) and (4,-2) be two points on the circle such that tangents at B and D meet at C. The area of the quadrilateral ABCD is

A

150 sq units

B

50 sq units

C

75 sq units

D

70 sq units

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A
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