This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
[{'content': 'Maximum Conducting velocity is of? \nSelect and explain. \nA. Purkinje fibers, B. Bundle of His, C. SA Node, D. AV bundle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a (Purkinje fibers). (Ref. Ganong, Physiology, 21st ed., Table 28-1)CONDUCTION SPEEDS IN CARDIAC TISSUETissueConduction Rate (m/s)SA node0.05Atrial pathways1AV node0.05Bundle of His1Purkinje system4Ventricular muscles1', 'role': 'assistant'}]