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': 'Munsell system is used to: \nSelect and explain. \nA. Deﬁne and measure colour qualitatively, B. Deﬁne and measure physical properties of gold alloys, C. Evaluate brittleness of diﬀerent alloys, D. Measure diﬀerent colours quantitatively', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Munsell system is used to measure diﬀerent colours quantitatively.', 'role': 'assistant'}]