A patient with pemphigus vulgaris reports sensitivity to spicy foods and shows buccal mucosal erythema. This finding indicates:

Correct answer: A. Active mucosal (oral) involvement of the disease

• A. Correct. Oral mucosal lesions are often the first and most persistent sign of pemphigus vulgaris; spicy-food sensitivity and erythema reflect active mucosal disease.
• B. Incorrect. Symptomatic erythema indicates active disease, not resolution.
• C. Incorrect. The findings are intraoral (mucosal), by definition not skin-only.
• D. Incorrect. In a known pemphigus patient, mucosal erythema is most consistent with the disease itself rather than a separate contact allergy.