This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Skin
[{'content': 'Volcano sign is seen in? \nSelect and explain. \nA. Leprosy, B. Leishmaniasis, C. Lupus vulgaris, D. DLE', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Leishmaniasis Volcano sign* It is descriptive term for the morphologic feature of Old World cutaneous leishmaniasis. The lesion starts as a small nontender papule, which enlarges in size and ulcerates in the centre. The border of the crusted ulcer often has an erythematous rim and is called as "Volcano sign".', 'role': 'assistant'}]