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
Regarding Sudeck's osteodystrophy all are true except: 
Select and explain. 
A. Burning pain, B. Stiffness and swelling, C. Erythematous and cyanotic discolouration, D. Self limiting and good prognosis
D: Self limiting and good prognosis
Answer: D: Self limiting and good prognosis 
Explanation: (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.