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: Ophthalmology
[{'content': 'A person with defective blue color appreciation is called ? \nSelect and explain. \nA. Deuteranomalous, B. Deuteranopia, C. Tritanopia, D. Tritanomalous', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., Tritanomalous", 'role': 'assistant'}]