This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart & Pericardium, Subject name: Surgery
[{'content': 'Pain from parietal pericardium is transmitted through? \nSelect and explain. \nA. Cardiac plexus, B. Greater splanchinc nerve, C. Intercostal nerve, D. Vagus nerve', 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) Vagus nerveREF: Gray's anatomy 39th edition page 996The pericardium is innervated by the vagus, together with phrenic nerves and the sympathetic trunks. Pericardial pain is typically a sharp severe substernal pain. It may be exacerbated by lying back or on the left side and relieved by leaning forward. It occasionally radiates to the upper border of trapezius.", 'role': 'assistant'}]