Mark (√) against the correct answer in the following: The general solution of the DE $x^{2} \frac{d y}{d x}=x^{2}+x y+y^{2}$ is. A. $\tan ^{-1} \frac{\mathrm{y}}{\mathrm{x}}=\log \mathrm{x}+\mathrm{C}$ B. $\tan ^{-1} \frac{\mathrm{x}}{\mathrm{y}}=\log \mathrm{x}+\mathrm{C}$ C. $\tan ^{-1} \frac{\mathrm{y}}{\mathrm{x}}=\log \mathrm{y}+\mathrm{C}$ D. None of these