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: Physiology
[{'content': 'Myosin filament has a fixed length of: \nSelect and explain. \nA. 0.16 nm, B. 1.6 micron, C. 16 nm, D. 1.6 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The total length of each myosin filament is uniform, almost exactly 1.6 micrometers.', 'role': 'assistant'}]