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': 'Conduction velocity in AV node 8c 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. is 'a' i.e., 0.05 meter/sec Cardiac tissueConduction velocity (meter/second)SA node0 [?] 05Inteatrial pathways1Atrial muscle0 [?] 30AV node0 [?] 05 (minimum)Bundle of His1Purkinje system4 (maximum)Ventricular muscle1", 'role': 'assistant'}]