The equation of the circle which touches x-axis and whose centre is (1

1.	The equation of the circle which touches x-axis and whose centre is (1, 2), is [MP PET 1984]
A.	\[{{x}^{2}}+{{y}^{2}}-2x+4y+1=0\]
B.	\[{{x}^{2}}+{{y}^{2}}-2x-4y+1=0\]
C.	\[{{x}^{2}}+{{y}^{2}}+2x+4y+1=0\]
D.	\[{{x}^{2}}+{{y}^{2}}+4x+2y+4=0\]
Answer» C. \[{{x}^{2}}+{{y}^{2}}+2x+4y+1=0\]

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The equation of the circle which touches x-axis and whose centre is (1, 2), is [MP PET 1984]

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