To solve this problem, we need to understand the concept of voids in a hexagonal primitive unit cell.$\\$In a hexagonal close-packed (hcp) structure, the number of atoms per unit cell is 6.$\\$Let's calculate the number of tetrahedral and octahedral voids:$\\$• Each atom in a close-packed structure creates one octahedral void and two tetrahedral voids.$\\$• Therefore, the number of octahedral voids per unit cell is equal to the number of atoms, which is 6.$\\$• The number of tetrahedral voids is twice the number of atoms, which is $2 \times 6 = 12. \\$Thus, the number of tetrahedral and octahedral voids in a hexagonal primitive unit cell are 12 and 6, respectively.$\\$Therefore, the correct option is Option 4: 12, 6.