Which of the following statements is or are true?

Due to frenkel defect, the density of the ionic solids does not changes

The volume of atoms present in a face centered cubic unit cell of a metal (r is atomic radii) is $\frac{16}{3}\pi r^3$

Two ions $A^{+}$  and $B^{-}$ have radii 88 pm and 200 pm respectively. In the close packed crystal of compound AB , the coordination number of $A^{+}$  is 6

In $CsCl$ crystal, edge length is 404 pm. The distance between the nearest neighbour is 350 pm.