This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
[{'content': 'The major cause of us is \nSelect and explain. \nA. M. canis, B. E. floccosum, C. T. rubrum, D. T. schoenlenii', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Favus is a chronic infection caused most commonly by T schoenleinii and usually affecting the scalp. Most common organism associated with us is Trichophyton schoenlenii. E. floccosum- cause Tinea unguium (nail beds) M. canis- cause ECTOTHRIX(infection of hair) T. rubrum- cause Tinea cruris (groin area)', 'role': 'assistant'}]