Which of the following statements is/are correct?

Options

A. Dislocation of ion from lattice site to intersitial site is called Frenkel defect.
B. Missing of +ve and -ve ions from their respective postion producing a parir of holes is called Sschorttky defect.
C. The presence of ions in the vacant intersitial sites along with lattice point is called interstital defect.
D. Non-stoichiometric NaCl is yellow solid.

Explanation

Non-stoichionetric NaCl has F-centers due to anion vacancy defect.