Which of the following lines is a tangent to the circle \[{{x}^{2}}+{{y}^{2}}=25\]for all values of m

Which of the following lines is a tangent to the circle \[{{x}^{2}}+{{

1.	Which of the following lines is a tangent to the circle \[{{x}^{2}}+{{y}^{2}}=25\]for all values of m
A.	\[y=mx+25\sqrt{1+{{m}^{2}}}\]
B.	\[y=mx+5\sqrt{1+{{m}^{2}}}\]
C.	\[y=mx+25\sqrt{1-{{m}^{2}}}\]
D.	\[y=mx+5\sqrt{1-{{m}^{2}}}\]
Answer» C. \[y=mx+25\sqrt{1-{{m}^{2}}}\]

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Which of the following lines is a tangent to the circle \[{{x}^{2}}+{{y}^{2}}=25\]for all values of m

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