Question

Rahul, who experiences the most common type of color deficiency, cannot distinguish some shades of _______.

Answer 1

The answer to this question is Red from green
There are only 3 colors that are considered as 'basic colors' that will produce another color if they're combined with one another, those colors are Red, Blue, and yellow.
The most common type of color deficiency damaged patient's perception of combination of color blue and yellow (which form the color green) and make them unable to distinguish the eye's sensitivity in perceiving these colors