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': "Glass holding cast is also known as: \nSelect and explain. \nA. Coll's cast, B. Smith's cast, C. Sarmento cast, D. Scaphoid cast", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Scaphoid cast', 'role': 'assistant'}]