This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special Senses: Vision and its Elements, Subject name: Physiology
Red colour blindness is called 
Select and explain. 
A. Protanopia, B. Deuteranopia, C. Protanomaly, D. Deuteranomaly
A: Protanopia
Answer: A: Protanopia 
Explanation: (A) Protanopia # Colour blindness: X-linked recessive disorder> Red-green blindness is more common in congenital type# Protonope: Missing of red sensation Deuteranope: Missing of green sensation Tritanope: Missing of blue sensation> Test for colour blindness# Isihara's test: are for routine testing particularly for -green blindness.# Farnsworth Munsell 100 hue test: Scientifically most accurate# Edridge-Green-Lantern test: mainly important for engine drivers Holmgren's wools test Negel's anamaloscope