$\text{The order of the differential equation whose general solution is given by }\mathrm{y}=\left(c_1+c_2\right)\cos \left(\mathrm{x}+{\mathrm{c}}_3\right)-{\mathrm{c}}_4{\mathrm{e}}^{\mathrm{x}+{\mathrm{c}}_5}\text{ where }{\mathrm{c}}_1,{\mathrm{c}}_2,{\mathrm{c}}_3,{\mathrm{c}}_4,{\mathrm{c}}_5$

$\mathrm{are}\mathrm{arbitrary}\mathrm{constants}\mathrm{is}$

• A

  5

• B

  4

• C

  3

• D

  2