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 has defective blue colour appreciation. His condition is better named as- \nSelect and explain. \nA. Deuteranomalous, B. Deuteranopia, C. Tritanopia, D. Tritanomalous', 'role': 'user'}, {'content': 'Answer: D \nExplanation: For defective (anomolous) colour vision, Suffix anomalous is used; and for absent colour, suffix anopia is used.', 'role': 'assistant'}]