This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
[{'content': 'A 36 years old factory worker developed itchy annular scaly plaques in both groins. Application of a caicosteroid ointment led to temporary relief but the plaques continued to extend at the periphery. The most likely diagnosis is: \nSelect and explain. \nA. Erythema annulare centrifugam, B. Granuloma annulare, C. Annular lichen planus, D. Tenia cruris', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D ie Tinea cruris', 'role': 'assistant'}]