A colour blind person cannot distinguish between _________?
Correct answer: B. Red & Green
- A. White & Yellow
- B. Red & Green
- C. Red & Black
- D. Green & Black
Explanation
The common form of red-green colour blindness makes red and green hues difficult to distinguish because the relevant cone pigments are absent or abnormal. Other colour-vision defects exist, but red-green deficiency is the standard answer.
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