1.

In the given figure, the equation of the larger circle is \[{{x}^{2}}+{{y}^{2}}+4y-5=0\] and the distance between centres is 4. Then the equation of smaller circle is

A. \[{{(x-\sqrt{7})}^{2}}+{{(y-1)}^{2}}=1\]
B. \[{{(x+\sqrt{7})}^{2}}+{{(y-1)}^{2}}=1\]
C. \[{{x}^{2}}+{{y}^{2}}=2\sqrt{7}x+2y\]
D. None of these
Answer» B. \[{{(x+\sqrt{7})}^{2}}+{{(y-1)}^{2}}=1\]


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