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Match the types of defect given in Column I with the statement given in Column II.
Column I
Column II
\( \mathrm{P} \)
(i) Impurity defect
(a) \( \mathrm{NaCl} \) with anionic sites called
W F-centres
(ii) Metal excess defect
(b) \( \mathrm{FeO} \) with \( \mathrm{Fe}^{3+} \)
(iii) Metal deficiency defect
(c) \( \mathrm{NaCl} \) with \( \mathrm{Sr}^{2+} \) and some cationic sites vacant
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