A dandy is a man, especially in the past, who dressed in expensive, fashionable clothes and was very interested in his own appearance. For example, "A renowned dandy, famous for his cane, monocle and ribbon ties." Hence, Option C is correct. Among the rest of the options, snob means a person who believes that their tastes in a particular area are superior to those of other people, duffer means an incompetent or stupid person, licentious means promiscuous and unprincipled in sexual matters. These options do not express the intended meaning, hence incorrect.