If $\mathrm{A}=\left\{1,2,4\right\}, \mathrm{B}=\left\{2,4,5\right\}, \mathrm{C}=\left\{2,5\right\},$ then $\left(\mathrm{A}-\mathrm{B}\right)\times \left(\mathrm{B}-\mathrm{C}\right)$ is

• A

  $\left\{\left(1,2\right), \left(1,5\right),\left(2,5\right)\right\}$

• B

  $\left\{\left(1, 4\right)\right\}$

• C

  $\left(1, 4\right)$

• D

  None of these