Which is not correct about the Schottky defects?

• A
  Both cations and anions are missing from their lattice sites without affecting the stoichiometry of the compound.
• B
  Because of presence of holes the lattice energy decreases.
• C
  The presence of holes causes the density of the crystal to decrease.
• D
  The defect increases the electrical conductivity of the solid due to migration of the ions into the holes.