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': 'In angina pectoris, the pain radiating down the left arm is mediated by increased activity in afferent (sensory) fibres contained in the \nSelect and explain. \nA. Carotid branch of the glossopharyngeal nerve, B. Phrenic nerve, C. Vagus nerve & recurrent laryngeal nerve, D. Thoracic splanchnic nerve', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. Thoracic splanchnic nerves', 'role': 'assistant'}]