A clinical photo shows a very small, firm, smooth, non-movable swelling on the gingiva/alveolus. The most likely interpretation is:

Correct answer: A. Normal mucosa over normal bone (e.g., bony contour/torus)

• A. Correct. A firm, smooth, fixed, asymptomatic gingival/alveolar bulge most often represents normal mucosa overlying a normal bony prominence (exostosis/torus).
• B. Malignancy is typically ulcerated, indurated, and growing — not a tiny smooth normal-colored bump.
• C. An abscess is fluctuant, tender, and erythematous.
• D. A mucocele is a soft, bluish, fluctuant swelling of minor salivary gland origin (lower lip), not a firm fixed gingival lesion.