In colour blindness red, green and other colours appear as

The correct option is C Grey

• Colour blindness is not really blindness it is the inability to see color. Red-Green color blindness is a sex-linked recessive disorder.
• The gene for the color receptor is located on X chromosome any defect in this gene causes a person to lose his ability to see red and green.
• For a colorblind person, red and green colors appear, Grey,

So, the correct answer is 'Grey'.