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': 'Conduction velocity in AV node & SA node? \nSelect and explain. \nA. 0.05 meter/sec, B. 0.5 meter/sec, C. 1 meter/sec, D. 5 meter/sec', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans .a.0.05 meter/sec [ref Genong2}n/eP' 522)", 'role': 'assistant'}]