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': 'Ventricular muscle receives impulses directly from the \nSelect and explain. \nA. Purkinje system, B. Bundle of HIS, C. Right and Left bundle branches, D. AV node', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]