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
Myosin filament has a fixed length of: 
Select and explain. 
A. 0.16 nm, B. 1.6 micron, C. 16 nm, D. 1.6 mm
B: 1.6 micron
Answer: B: 1.6 micron 
Explanation: The total length of each myosin filament is uniform, almost exactly 1.6 micrometers.