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# The general solution of the differential equation $\large\frac{dy}{dx}=\frac{-y}{x}$ is a family of curves which looks most like which of the following

$\large\frac{dy}{y} =\frac{-dx}{x}$
$\log y+\log x=c$
$xy=c'$
family of Rectangular hyberpola
Hence b is the correct answer.