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    Question

    A colour-blind person cannot

    –
    A See distant objects Correct Answer Incorrect Answer
    B See black colour Correct Answer Incorrect Answer
    C Distinguish between certain colours Correct Answer Incorrect Answer
    D Have persistence of vision Correct Answer Incorrect Answer

    Solution

    Colour blindness or colour vision deficiency is the inability or decreased ability to see coluor, or perceive colour differences, under normal lighting conditions. The most usual cause is a fault in the development of one or more sets of retinal cones that perceive colour in light and transmit that information to the optic nerve. This type of colour blindness is usually a sex-linked condition.

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