Let R be a relation of N defined by $\mathrm{x}+2\mathrm{y}=8$. The domain of R is

• A

  $\left\{2, 4, 8\right\}$

• B

  $\left\{2, 4, 6, 8\right\}$

• C

  $\left\{2, 4, 6\right\}$

• D

  $\left\{1, 2, 3, 4\right\}$