The differential equation whose general solution is $\mathrm{y}^{2}+\mathrm{x}=1+\mathrm{my}$ where $\mathrm{m}$ is an arbitrary constant, is
(a) $\mathrm{y}=\mathrm{x} \frac{\mathrm{d} \mathrm{y}}{\mathrm{d} \mathrm{x}}+2$
(b) $\frac{d^{2} y}{d x^{2}}+x \frac{d y}{d x}+y=0$
(c) $x^{2} \frac{d^{2} y}{d x^{2}}+x \frac{d y}{d x}+y=0$
(d) $y=\left(x-y^{2}-1\right) \frac{d y}{d x}$