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: Medicine
[{'content': 'All are true about the features of erythromelalgia , EXCEPT: \nSelect and explain. \nA. Unknown aetiology, B. Thrombocytosis is seen, C. Digital infarction is seen, D. Treatment is steroids', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Erythromelalgia Syndrome of unknown etiology It is associated with thrombocytosis Manifested by erythema, warmth, and pain of the affected appendage and occasionally digital infarction. It usually respond to salicylates. Ref: Harrison, E-18,P-903', 'role': 'assistant'}]