Plz answer quickly

Dear Student,
Octahedral voids are formed by the combination of voids of two triangular layers of atoms when one triangular layer is placed above another, as shown in the figure,

The tetrahedral void is the name given to the vacant space formed by touching of four spheres, as shown in the figure,

HCP and CCP pair of structures are tetrahedral and octahedral voids.
Hence, the correct option is C.
Regards!