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the equation of the circle passing throu...

the equation of the circle passing through the point `(2,1)` and touching `y`-axis at the origin is

A

`x ^(2) + y ^(2) - 5x =0`

B

`2x^(2) + 2y ^(2) -5x=0`

C

`x ^(2) + y^(2) + 5x =0`

D

None of these

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The correct Answer is:
B
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