Which of the following statements is correct?

Which among the following statements is $NOT$ true about Frenkel defect?

Schottky defect is generally observed in which type of compounds?

In $AgBr$ crystal,the ion size lies in the order $Ag^{+} << Br^{-}$. The $AgBr$ crystal should have the following characteristics:

What type of stoichiometric defect is shown by:
$(i)$ $ZnS$
$(ii)$ $AgBr$

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ In a particular point defect,an ionic solid is electrically neutral,even if few of its cations are missing from its unit cells.
Reason $(R):$ In an ionic solid,Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site,maintaining overall electrical neutrality.
In the light of the above statements,choose the most appropriate answer from the options given below: