Which from following ionic crystals exhibits Frenkel defect?

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Frenkel defect is exhibited by ionic compounds in which there is a large difference in the size of the cation and the anion. The smaller ion (usually the cation) is dislocated from its normal site to an interstitial site. ZnS shows Frenkel defect because of the small size of the Zn ²⁺ ion compared to the S ²⁻ ion. Alkali metal halides like NaCl , KCl , and KBr exhibit Schottky defect because their cations and anions are of almost similar sizes. Answer: ZnS