Identifying Irony in a Character's Actions

In her novel, Jane often describes the small-town sheriff, who prides himself on maintaining law and order, as a 'guardian of justice'. Ironically, in the story, he turns a blind eye to the small acts of vandalism and petty theft happening in the town, believing that they are insignificant. This contradiction between his self-image and his actions highlights the paradox of his role.

Based on this passage, which of the following statements best illustrates irony?