Correct Answer - C
(A)=8.95 , (B)=8.95, (C )=3.0 , (D) =7.14
Across the period atomic volume decrease upto copper due poor shielding of d-orbital electrons and addition of extra electrons in inner orbital and then increase inZinc due to interelectronic repulsion in completely filled d-and s-orbitals. Consequently densities increase from Sc to Cu and then decreases in Zn.
