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: Anatomy
[{'content': 'Length of a mature human spermatozoon is? \nSelect and explain. \nA. 50-60 microns, B. 10-40 microns, C. 100-200 microns, D. 300-500 microns', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. 50- 60 microns', 'role': 'assistant'}]