Final answer:
Sebaceous adenitis is characterized by inflammation of the sebaceous glands, responsible for producing the oily substance sebum that lubricates and protects the skin.
Step-by-step explanation:
Sebaceous adenitis is an inflammation of the sebaceous glands.
These glands are responsible for producing sebum, an oily substance that helps to waterproof and lubricate the skin and hair. Sebum has antibacterial properties that protect the skin from microorganisms. When sebaceous glands become inflamed, it can disrupt the normal production and release of sebum, leading to problems such as dry skin or hair loss. Sebaceous adenitis does not involve overproduction of sweat glands, increased tear gland activity, or enlargement of hair follicles.
Therefore, the correct answer is B) Inflammation of sebaceous glands.