Q.

A man with colour blindness will see red as -

A. Yellow
B. Blue
C. Green
D. Violet
Answer» C. Green
Explanation: Colour-blindness is the inability to distinguish the differences between certain colours. This condition results from an absence of colour-sensitive pigment in the cone cells of the retina, the nerve layer at the back of the eye. A person with colour-blindness has trouble seeing red, green, blue, or mixtures of these colors. The most common type is red-green colour-blindness, where red and green are seen as the same color.
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