A body centre cubic lattice is made up of two different types of atoms $\text{A}$ and $\text{B}\text{.}$ Atom $\text{A}$ occupies the body centre and $\text{B}$ occupying the corner positions. One of the corners is left unoccupied per unit cell. Empirical formula of such a solid is

• A

  $\text{AB}$
• B

  ${\text{A}}_{\text{2}}{\text{B}}_{\text{2}}$
• C

  ${\text{A}}_{\text{5}}{\text{B}}_{\text{7}}$
• Correct answer
  D

  ${\text{A}}_{\text{8}}{\text{B}}_{\text{7}}$

Hence, the correct answer is option: 'D'.