Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields-

1.  o-cresol                                   

2.  m-cresol

3.  2, 4- dihydroxytoluene         

4.  benzyl alcohol

Hint: Free radical substitution reaction followed by substitution reaction.

Monochlorination of toluene in sunlight gives benzyl chloride. On hydrolysis with aq. NaOH, benzyl chloride shows nucleophilic substitution reaction to give benzyl alcohol.

The reaction is as follows:


ncert-exemplar-problems-class-12-chemistry-alcohols-phenols-ethers-1

So, the correct option is (4)