Green weakness is Deuteranomalous.

• A. Deuteranomalous
• B. Protanomalous
• C. Tritanomalous
• D. Achromatopsia

Answer: (A)

Green weakness arises from a red-green color vision deficiency, specifically a mild form called deuteranomalous. In this condition, the green-sensitive cones (M-cones) have altered pigment sensitivity, shifting their response toward the red end of the spectrum. The result is that greens can look more like reds, making it harder to distinguish between greens and reds, especially under certain lighting conditions. It’s the most common form of red-green deficiency and is inherited in an X-linked pattern, so it occurs more often in men but can affect anyone.

The other possibilities describe different issues: protanomalous affects the red cone and red perception; tritanomalous affects blue-yellow discrimination; achromatopsia is complete color blindness.