1.

The equation \[\frac{{{x}^{2}}}{2-r}+\frac{{{y}^{2}}}{r-5}+1=0\] represents an ellipse, if   [MP PET 1995]

A.            \[r>2\]                                       
B.            \[2<r<5\]
C.            \[r>5\]                                       
D.            None of these
Answer» C.            \[r>5\]                                       


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