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': 'Which of the following can cause endothrix (Black dot)\n i. Trichophyton violaceum \n ii. Trichophyton tonsurans \n iii. Trichophyton veruccosum \n iv. Microsporum canis \nSelect and explain. \nA. i, B. i & ii, C. i, ii & iii, D. i, ii, iii & iv', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Endothrix:T.tonsurans T. violaceum,\xa0\nEctothrix: M. canis.', 'role': 'assistant'}]