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': 'Metamerism invariably involves _____. \nSelect and explain. \nA. A color difference between two objects under one or more illuminant(s), B. One object having a lower chroma than another, C. One object having a lower lightness than another, D. A significant color change of one object as it moves from one illuminant to another', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Metamerism is the phenomenon where a color match under a lighting condition appears different under a different lighting condition.', 'role': 'assistant'}]