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: Anatomy
[{'content': 'A 59 year old man complains of recurrent attacks of pain in the region of left shoulder radiating to sternum and the pit of stomach. The attacks of pain came at lengthy intervals until the last two days when it became continuous. The physician diagnosed it as an angina pectoris. In this case the pain pathway from the heart is carried by - \nSelect and explain. \nA. Superior cervical cardiac nerve, B. Middle and inferior cervical cardiac nerve, C. Thoracic splanchnic nerve, D. Vagus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]