The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :

Given below are two statements.

Statement I : Frenkel defects are vacancy as well as interstitial defects.

Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres.

Choose the most appropriate answer for the statements from the options given below :

The incorrect statement is :

Excess of isobutane on reaction with Br₂ in presence of light at 125$$^\circ$$C gives which one of the following, as the major product?