Writing a recipe is a very precise form of writing. IF you mess up or confuse the baker then the recipe won't turn out the way it should. In this case, using chronological order would ensure that the instructions are clear.
B) Antonyms, because sweet means “having the pleasant taste characteristic of sugar or honey; not salty, sour, or bitter.” while pungent means “having a sharply strong taste or smell.” So, they are antonyms.