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: Orthopaedics
[{'content': 'A lady presents with swelling of hands with shiny skin. She has a history of fracture radius and kept on the POP cast for 4 weeks after which she develops this. Give the most likely diagnosis - \nSelect and explain. \nA. Myositis ossification, B. Rupture of external pollicis longus tendon, C. Reflex sympathetic dystrophy, D. Malunion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Swelling of hands with shiny skin and history of trauma (fracture radius) suggest the diagnosis of RSD.', 'role': 'assistant'}]