A relation R is defined from $\left\{2, 3, 4, 5\right\} \mathrm{to} \left\{3, 6, 7, 10\right\}$ by $\mathrm{xRy}\iff \mathrm{x}$ is relatively prime to y. Then domain of R is

• A

  $\left\{2, 3, 5\right\}$

• B

  $\left\{3 5\right\}$

• C

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

• D

  $\left\{2, 3, 4, 5\right\}$