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The distance of the y - axis from from t...

The distance of the y - axis from from the center of the circle which lies in the first quadrant (see figure) and tangent to the lines `y=(1)/(2)x,y =4` and the x-axis is

A

`4+2sqrt5" units"`

B

`4-(8sqrt5)/(5)" units"`

C

`2+(6sqrt5)/(5)" units"`

D

`4-2sqrt5" units"`

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The correct Answer is:
A
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