Monochlorination of toluene in sunlight followed by hydrolysis with aq. yields.
(i) o-Cresol
(ii) m-Cresol
(iii) 2, 4-Dihydroxytoluene
(iv) Benzyl alcohol
The answer is the option (iv). The monochlorination of toluene in sunlight results in halogenation that follows a free radical pathway and the product will react with the alkyl group forming haloalkyl.
And in the alkaline medium, the substitution reaction will take place resulting in the deduction of a hydrogen atom from the haloalkyl group. The end product formed will be alcohol; therefore, the monochlorination of toluene in light in the presence of aq. NaOH forms benzyl alcohol. So, option (iv) is the correct answer.