Which of the following statements is correct in the rock-salt structure of ionic compounds?

Which of the following statements is correct for the rock-salt structure of an ionic compounds?

Which of the following statement is/are incorrect in the rock-salt structure if an ionic compounds ? (A) coordination number of cation is four where as that of anion is six. (B) coordination number of cation is six where as that of anion is four. (C) coordination number of each cation and anion is four. (D) coordination number of each cation and anion is six.

Which of following statements is correct in the zinc-blende-type structure of an ionic compound?

Which of following statements is correct in the zinc-blende-type structure of an ionic compound?

Which of following statements is correct in the zinc-blende-type structure of an ionic compound?

Which of following statements is correct in the zinc-blende-type structure of an ionic compound?

Which of following statements is correct in the zinc-blende-type structure of an ionic compound?

Which one of the following statements is incorrect about rock salt type ?