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: Dental
[{'content': 'A 24 year male came to OPD with brownish itchy patches in axilla, blood lamp examination shows "coral red" fluroscence. Most likely diagnosis is: \nSelect and explain. \nA. Tenia corporis, B. Hidradenitis suppurativa, C. Erythrasma, D. Tinea crusis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Erythrasma is caused by Corynebacterium.minutissimum characterized by intense itchy brownish red patches in axilla and groin , which on wood lamp examination shows characteristic "coral red" fluorescence.', 'role': 'assistant'}]