(i) hcp

(ii) bcc

(iii) simple cubic

(iv) fcc

Correct Answers:

(i) hcp

(iv) fcc

Explanation:  In hep and fcc arrangement, octahedral voids are formed. Charging, octahedral voids are seen on the edges and center of the cube while in bcc and in simple cubic, nothing is taken with octahedral voids. In bcc, cubic voids are formed