This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
A person has defective blue colour appreciation. His condition is better named as - 
Select and explain. 
A. Deuteranomalous, B. Deuteranopia, C. Tritanopia, D. Tritanomalous
D: Tritanomalous
Answer: D: Tritanomalous 
Explanation: Anomaly : defective color perception Anopia : color perception absent Trit : blue Prot: red Deutr: green Ref:AK Khurana 4thE pg 303.