R is a relation from $\left\{11, 12, 13\right\}$ to $\left\{8, 10, 12\right\}$ defined by $\mathrm{y}=\mathrm{x}-3.$ Then ${\mathrm{R}}^{-1}$ is

• A

  $\left\{\left(8, 11\right), \left(10, 13\right)\right\}$

• B

  $\left\{\left(11, 18\right), \left(13, 10\right)\right\}$

• C

  $\left\{\left(10, 13\right), \left(8, 11\right)\right\}$

• D

  None of these