Which of the following differential equations has `y= x` as one of its particular solution?

Options

A. `((d^2y)/(dx^2)) - x^2((dy)/dx) + xy = x`
B. `((d^2y)/(dx^2)) + x((dy)/dx) + xy = x`
C. `((d^2y)/(dx^2)) - x^2((dy)/dx) + xy = 0`
D. `((d^2y)/(dx^2)) + x((dy)/dx) + xy = 0`