The degree of the differential equation $\frac{d^2 y}{d x^2}+3\left(\frac{d y}{d x}\right)^2=x^2 \log \left(\frac{d^2 y}{d x^2}\right)$, is
Answer & explanation
Correct answer: option 4
Since the equation is not a polynomial in all differential coefficients. So, its degree is not defined.