The equation \[{{y}^{2}}-{{x}^{2}}+2x-1=0\] represents [MNR 1991] – McqOptions

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1.	The equation \[{{y}^{2}}-{{x}^{2}}+2x-1=0\] represents [MNR 1991]
A.	A pair of straight lines
B.	A circle
C.	A parabola
D.	An ellipse
Answer» B. A circle

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