The correct option is C Nostalgia
Nostalgia is a sentimental longing or wistful affection for a period in the past, especially with regards to a person. For example, "I was overcome with acute nostalgia for my days at university." Hence, Option C is correct. Among the rest of the options, hysteria means exaggerated or uncontrollable emotion or excitement, megalomania means delusion about one's own power or importance (typically as a symptom of manic or paranoid disorder)., logomania means pathologically excessive (and often incoherent) talking. These do not express the intended meaning, hence incorrect.