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If the tangents drawn at the points. O(0...

If the tangents drawn at the points. O(0, 0) and P `(1+sqrt5,2)` on the circle `x^2+y^2-2x-4y=0` intersect at the point Q, then the area of the triangle OPQ is equal to

A

`(3+sqrt5)/2`

B

`(4+2sqrt5)/2`

C

`(5+3sqrt5)/2`

D

`(7+3sqrt5)/2`

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