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': 'At low levels of light, the colour perception of the eyes is lost. As the brightness becomes more intense, colour appears to change. This phenomenon is known as \nSelect and explain. \nA. Metamerism, B. Fluorescence, C. Reflection Effect, D. Bezold-Brucke effect', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]