The outer shell of the atoms in group

are empty

are half full

are full

need one more electron to be full.

Option C) Are Full

Explanation: In the modern periodic table, Group D is placed between S and P blocks. The valency of this group display number of valencies. The valency of an element can be defined as the number of hydrogen atoms that can either or replace one atom of that element.

For Group D elements, the outer most shell are observed to be full.