Pernicious anaemia is due to the the deficiency of

• A

  $\mathrm{Vitamin}-\mathrm{C}$

• B

  $\mathrm{Vitamin}-\mathrm{K}$

• C

  $\mathrm{Vitamin}-{\mathrm{B}}_{12}$

• D

  $\mathrm{Vitamin}-{\mathrm{B}}_9$