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
A person with defective blue color appreciation is called ? 
Select and explain. 
A. Deuteranomalous, B. Deuteranopia, C. Tritanopia, D. Tritanomalous
D: Tritanomalous
Answer: D: Tritanomalous 
Explanation: Ans. is `d' i.e., Tritanomalous