Arrange the following differential equations in ascending order in accordance to degree

(A) \(\left[1+\left(\frac{d y}{d x}\right)^2\right]^{\frac{3}{2}}=\frac{d^2 x}{d x^2}\)

(B) \(\left(\frac{d y}{d x}\right)^5+y=0\)

(C) \(\frac{d^2 y}{d x^3}+a^2 x=0\)

(D) \(x^2\left(\frac{d^3 y}{d x^2}\right)^3+y\left(\frac{d y}{d x}\right)^4+y^4=0\)

Choose the correct answer from the options given below: