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': 'The most important mechanical property involved when a base metal partial denture clasp is adjusted is: \nSelect and explain. \nA. Hardness, B. Elongation, C. Elastic limit, D. Tensile strength', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]