A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :-

Question

( A ) $C_2A_3$
( B ) $C_3A_4$
( C ) $C_4A_3$
( D ) $C_3A_2$