1 MCQs in Dermatology for NEET PG
A 28-year-old woman presents with a 6-week history of burning and stinging around her mouth. On examination, she has clusters of small erythematous papules and papulopustules on the chin and nasolabial folds. The structure marked **B** in the diagram—the characteristic clear zone of unaffected skin immediately adjacent to the vermilion border—is notably preserved. Which of the following diagnoses is most strongly supported by this finding?
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