Option 1 -> Dreamy means being in a daydream-like state or having a vague quality; not related to temperament.
Option 2 -> Genial means friendly, warm, and cheerful in manner; directly opposite to irritable or bad-tempered.
Option 3 -> Decorous means proper and dignified in behavior; relates to propriety, not temperament.
Option 4 -> Conscious means being aware or awake; unrelated to mood or temperament.
Hence, Option 2: Genial -> "Peevish" means irritable, easily annoyed, or bad-tempered, while "genial" means friendly, cheerful, and pleasant, making them perfect antonyms in terms of temperament and disposition -> correct