Which type of 'defect' has the presence of cations in the interstitial sites ?

Frenkel defect is a type of 'point defect' in crystalline solids where an atom is displaced from its lattice position to an interstitial site. Hence the correct answer is option (a). Assertion-Reason Type Questions While answering these questions, you are required to choose any one of the following four responses. (a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. (b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect. (d) If the Reason is