The correct order of acidity of the following is

Step-by-step solution

The electron withdrawing groups increases the acidic strength of phenols and the electron releasing groups decreases the acidic strength of phenols. The methyl group and methoxy groups are electron releasing groups at para position. Hence, both p-cresol and p-methoxy phenol are less acidic than phenol. Methoxy group is electron releasing group by +M effect and methyl group is hyperconjugation. Hence, p-methoxy pheniol is less acidic than p-cresol. The correct acidic strength order is