What is the equation to circle which touches both the axes and has cen

1.	What is the equation to circle which touches both the axes and has centre on the line \[x+y=4?\]
A.	\[{{x}^{2}}+{{y}^{2}}-4x+4y+4=0\]
B.	\[{{x}^{2}}+{{y}^{2}}-4x-4y+4=0\]
C.	\[{{x}^{2}}+{{y}^{2}}+4x-4y-4=0\]
D.	\[{{x}^{2}}+{{y}^{2}}+4x+4y-4=0\]
Answer» C. \[{{x}^{2}}+{{y}^{2}}+4x-4y-4=0\]

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What is the equation to circle which touches both the axes and has centre on the line \[x+y=4?\]

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