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: Microbiology
[{'content': '"Black dot" ring worm is caused by \nSelect and explain. \nA. Microsporum, B. Epidermophyton, C. Candida, D. Trichophyton', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In endothrix, a Trichophyton infection, the hair shaft breaks off at the skin surface, leaving the hairs visible as black dots in the scalp.', 'role': 'assistant'}]