This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
[{'content': "Regarding Sudeck's osteodystrophy all are true except: \nSelect and explain. \nA. Burning pain, B. Stiffness and swelling, C. Erythematous and cyanotic discolouration, D. Self limiting and good prognosis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: (d) Self limiting and good prognosis- Recovery is prolonged and painful both for patient and surgeon. 3 years usually elapse before the bones are remineralized and it is rare that full range of movements returns.', 'role': 'assistant'}]