Which of the following is incorrect statement? (1) Frenkel defect is also called dislocation def...

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Which of the following is incorrect statement?
(1) Frenkel defect is also called dislocation defect.
(2) \( \mathrm{KCl} \) shows schottky defect.
(3) \( \mathrm{Fe}_{0.93} \mathrm{O} \) shows metal deficiency defect.
(4) Vacancy and interstitial defects are found in ionic compound.
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