Gum disease is also known as periodontal disease.

• A. Allergy
• B. Gum disease
• C. Acne
• D. Sunscreen

Answer: (B)

Gum disease and periodontal disease refer to the same problem: inflammation and infection of the gums and the supporting structures around the teeth. Periodontal means around the tooth, so periodontal disease is the formal term for what people commonly call gum disease. This concept matters because it explains why the statement is true: it names the same condition with a more technical term.

Periodontal disease often starts with gingivitis (gum inflammation) from plaque buildup, and can progress to periodontitis, where the supporting bone and tissues are affected. Good oral hygiene, regular dental cleanings, and addressing risk factors like smoking or diabetes help prevent and control it.

The other options describe conditions unrelated to the gums—an allergy (immune reaction on the skin or airways), acne (skin condition), and sunscreen (protective skin product). They don’t describe gum disease, so they don’t fit.