This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
[{'content': 'Difference in Acne rosacea & Acne vulgaris \nSelect and explain. \nA. Pustule, B. Erythema, C. Papule, D. Absence of comedone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Erythema and papulo-pustule (papules and pustules) are seen both in Acne rosacea and Acne vulgaris Comedones are absent in Acne rosacea (a characteristic feature of Acne vulgaris) Ref Harrison 20th edtion pg 1213', 'role': 'assistant'}]