1.

If the foci of an ellipse are \[(\pm \sqrt{5},\,0)\] and its eccentricity is \[\frac{\sqrt{5}}{3}\], then the equation of the ellipse is  [J & K 2005]

A.            \[9{{x}^{2}}+4{{y}^{2}}=36\]     
B.            \[4{{x}^{2}}+9{{y}^{2}}=36\]
C.            \[36{{x}^{2}}+9{{y}^{2}}=4\]    
D.            \[9{{x}^{2}}+36{{y}^{2}}=4\]
Answer» C.            \[36{{x}^{2}}+9{{y}^{2}}=4\]    


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