a. The theft of the old man's most prized possession brings him happiness.
Explanation:
Irony is a figure of speech in which words are used in such a way that their intended meaning is different from the actual meaning of the words. It may also be a situation that ends up in quite a different way than what is generally anticipated. In simple words, it is a difference between appearance and reality. and it says the theftt of his most prized possession brings him happiness.Now, most people if somebody steals their most prized possession won't bring us happiness it would make us upset and mad.
