Read the passage given below and answer the following question
No crystal is found to be perfect at room temperature . These defects are basically irregularities in the arrangement of constituents particles. These defects can be stoichiometric or Non-stoichiometric. Stoichiometric defects are of two types : Schottky and Frenkel defect. Schottky is basically a vacancy defect while Frenkel is an interstitial defect. Due to non-stoichiometric defects , the formula of the ionic compound is different from the ideal formula. These defects are also of two types : (i) Metal excess defect and (ii) Metal deficiency defect.
What type of defect is shown by AgCl ?

Options

A. Schottky defect
B. Frenkel defect
C. Metal excess defect
D. Metal deficiency defect