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': 'Which of the following hardness test is a micro hardness test? \nSelect and explain. \nA. Brinnel, B. Knoop, C. Shore-A, D. Rockwell', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]