In a compound, atoms of element $\text{Y}$ form ccp lattice and those of element $\text{X}$ occupy $2/3$ rd of tetrahedral voids. The formula of the compound will be:

1. A
   ${\text{X}}_4{\text{Y}}_3$
2. B
   ${\text{X}}_2{\text{Y}}_3$
3. C
   ${\text{X}}_2\text{Y}$
4. D
   ${\text{X}}_3{\text{Y}}_4$