Regarding descriptive terms used in dermatology, which of the following associations is correct?

b. Macule is a descriptive term for a flat but well-defined area of skin change. Papule refers to a raised macule that is less than 0.5cm in diameter, i.e. a circumscribed area of skin that is elevated. A nodule is the counterpart to a papule that is greater than 0.5cm in diameter. Plaques refer to more discoid elevations of the skin that can be small when less than 2cm in diameter or large when greater than 2cm. A vesicle describes a localised collection of fluid less than 0.5cm in diameter such as found typically in herpes zoster. A bulla describes the counterpart that is greater than 0.5cm in diameter. A pustule is simply a collection of pus in the skin. A weal is usually associated with allergic reactions such as seen in urticarial disorders and represents a localised area of oedema within the skin.