The equation \[{{x}^{2}}+{{k}_{1}}{{y}^{2}}+{{k}_{2}}xy=0\] represents – McqOptions

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1.	The equation \[{{x}^{2}}+{{k}_{1}}{{y}^{2}}+{{k}_{2}}xy=0\] represents a pair of perpendicular lines, if
A.	\[{{k}_{1}}=-1\]
B.	\[{{k}_{1}}=2{{k}_{2}}\]
C.	\[2{{k}_{1}}={{k}_{2}}\]
D.	None of these
Answer» B. \[{{k}_{1}}=2{{k}_{2}}\]

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