The line \[y=x+c\]will intersect the circle \[{{x}^{2}}+{{y}^{2}}=1\]in two coincident points, if

The line \[y=x+c\]will intersect the circle \[{{x}^{2}}+{{y}^{2}}=1\]i

1.	The line \[y=x+c\]will intersect the circle \[{{x}^{2}}+{{y}^{2}}=1\]in two coincident points, if
A.	\[c=\sqrt{2}\]
B.	\[c=-\sqrt{2}\]
C.	\[c=\pm \sqrt{2}\]
D.	None of these
Answer» D. None of these

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The line \[y=x+c\]will intersect the circle \[{{x}^{2}}+{{y}^{2}}=1\]in two coincident points, if

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