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: Surgery
[{'content': "Features of Raynaud's disease are all except \nSelect and explain. \nA. Common in young females, B. Commonly unilateral, C. Repeated attacks occur, D. Peripheral pulses are normally felt", 'role': 'user'}, {'content': "Answer: B \nExplanation: Raynaud's disease is usually Bilateral.", 'role': 'assistant'}]