Which of the following statements is correct in the rock-salt structure of an ionic compound?
Co-ordination number of cation is four and anion is six
Co-ordination number of cation is six and anion is four
Co-ordination number of each cation and anion is four
Co-ordination number of each cation and anion is six
In NaCl structure Cl- ions are present at fcc lattice point Na+ ions are present in all octahedral void