$\text{ The degree of the differential equation }{\left(\frac{{\mathrm{d}}^2\mathrm{y}}{{\mathrm{dx}}^2}\right)}^2+{\left(\frac{\mathrm{dy}}{\mathrm{dx}}\right)}^2=\mathrm{xsin}\left(\frac{{\mathrm{d}}^2\mathrm{y}}{{\mathrm{dx}}^2}\right)\text{ is }$

• A

  1

• B

  2

• C

  3

• D

  degree is not defined