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: Dental
[{'content': 'Hand cutting instruments are composed of \nSelect and explain. \nA. Handle and blade, B. Handle, shank and blade, C. Shank and blade, D. Handle, shank and head', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]