Colour-blindness is inability to distinguish colours :

(a) red-blue
(b) red-yellow
(c) red-green
(d) blue-green

Anurag Mishra Professor Asked on 18th January 2016 in Health & Fitness.
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    Answer: (c) red-green 

    Anurag Mishra Professor Answered on 20th January 2016.
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