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: ENT
[{'content': 'Ossicular ratio is = \nSelect and explain. \nA. 1.3 : 1, B. 1.2 : 1, C. 1.1 : 1, D. 1:01', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]