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
Most common type of colour blindness is 
Select and explain. 
A. Protanopes, B. Tritanopes, C. Deuteranopes, D. Hamarlopes
A: Protanopes
Answer: A: Protanopes 
Explanation: Protanopes - Red is defective.
Tritanopes - blue is defective.
Deuteranopes - Green is defective.