Which of the phenol derivative is most acidic?

Phenol derivatives are

The phenolic derivative used in mouth wash is

Benzoic acid is more acidic than acetic acid, fomic acid is more acidic than benzoic acid, among monsoubstituted benzoic acid derivative, the ortho derivative is more acidic than meta and para substiued acid due to ortho effect. Acidity of an acid can be explained base of which compound will be most stable? Conjugated base of which compound will be most stable?

Benzoic acid is more acidic than acetic acid, fomic acid is more acidic than benzoic acid, among monsoubstituted benzoic acid derivative, the ortho derivative is more acidic than meta and para substiued acid due to ortho effect. Acidity of an acid can be explained base of which compound will be most stable? Which one the following is most acidic?

Among the following phenols which is most acidic?