For the equation ax^(2) +by^(2) + 2hxy...

For the equation
`ax^(2) +by^(2) + 2hxy + 2gx + 2fy + c =0` where `a ne 0`, to represent a circle, the condition will be

A

`a=b=0 and c=0`

B

`f =g and h =0`

C

`a=b ne 0 and h =0`

D

`f =g and c =0`

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The correct Answer is:

C

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