Given : Radius of A2+ = 100 pm; Radius of C+ = 240 pm; Radius of B2- = 300 pm; Radius of D- = 480 pm. Which is / are correct statement?

rA2+rB2−=100300=0.333 rC+rD−=240480=0.5B2− are at F.C.C.  D− at F.C.C. lattice point lattice point and A2+ ion are C+ in all octahedral voids alternate tetrahedral voidC.No. of AB = 4 : 4          C.No. of CD = 6 :6