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: Microbiology
[{'content': 'Frisch bacillus affects most commonly \nSelect and explain. \nA. Mouth, B. Nose, C. Eye, D. Ear', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Nose", 'role': 'assistant'}]