Order and degree of the differential equation $\frac{d^2 y}{d x^2}=\left\{y+\left(\frac{d y}{d x}\right)^2\right\}^{1 / 4}$are

4 and 2 1 and 2 1 and 4 2 and 4

2 and 4

The given differential equation can be written as $\left(\frac{d^2 y}{d x^2}\right)^4=\left\{y+\left(\frac{d y}{d x}\right)^2\right\}$ Clearly, its order and degree are 2 and 4 respectively.