If the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] touches x-axis, then

If the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] touches x-axis

1.	If the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] touches x-axis, then
A.	\[g=f\]
B.	\[{{g}^{2}}=c\]
C.	\[{{f}^{2}}=c\]
D.	\[{{g}^{2}}+{{f}^{2}}=c\]
Answer» C. \[{{f}^{2}}=c\]

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If the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] touches x-axis, then

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