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': 'All are true about Raynaud’s phenomena except: \nSelect and explain. \nA. Exposure to cold aggravates, B. Spasm of vessels, C. More common in females, D. Atherosclerosis of vessels', 'role': 'user'}, {'content': 'Answer: D \nExplanation: RAYNAUD’S\xa0PHENOMENON\n\nRaynaud’s phenomenon is characterized by episodic digital ischemia on exposure to cold or emotional stress.\nManifested by the sequential development of digital blanching, cyanosis and rubor (redness) of fingers or toes.\nBCR: Blanching, Cyanosis and Rubor (redness)', 'role': 'assistant'}]