The correct option is D Wax
Apiculture
The practice of rearing and caring of bees for obtaining honey and wax is known as apiculture.
Royal jelly
Royal jelly is a proteinaceous byproduct of apiculture which is secreted by the worker bees to feed the queen. It is used for medical purposes such as treatment of skin disorders and asthma.
Honey
Honey is the main product of apiculture which is produced by worker bees from nectar of the flowers. It is an aromatic sweet syrup that acts as a natural sweetener, laxative (prevents constipation), expectorant (helps to treat coughs) and a blood purifier.
Wax
Wax is the yellowish brown insoluble byproduct of apiculture. Beeswax is the secretion from the wax-producing abdominal glands of worker (sterile female) bees. Beeswax is rich in fatty acid. It has anti-inflammatory properties and makes skin texture smooth. Hence it is used in cosmetics, ointments and polishes.
Final answer
b. Wax.