A cubic solid is made up of two elements $\mathrm{X}$ and $\mathrm{Y}$. Atoms of $\mathrm{X}$ are present on every alternate corner and one at the center of cube. $\mathrm{Y}$ is at ${\frac{1}{3}}^{\mathrm{rd}}$ of the total faces. The empirical formula of the compound is

• A

  ${\mathrm{X}}_2{\mathrm{Y}}_{1.5}$
• Correct answer
  B

  ${\mathrm{X}}_{1.5}\mathrm{Y}$
• C

  ${\mathrm{XY}}_{2.5}$
• D

  ${\mathrm{X}}_{1.5}{\mathrm{Y}}_2$

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