This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Most common sign/symptom of phaeochromocytoma \nSelect and explain. \nA. Hypeension, B. Headache, C. Sweating, D. Palpitation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Clinical signs of phaeochromocytomaSymptomsPrevalence (%)Hypeension Paroxysmal Continuous 80-9050-6030Headache 60-90Sweating 50-70Palpitation 50-70Pallor 40-45Weight loss 20-40Hyperglycaemia 40Nausea 20-40Psychological effects 20-40Ref: Bailey and Love 27e pg: 845', 'role': 'assistant'}]