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Colour blindness, in which all the colours are perceived as grey is termed as

(a) monochromasia (b) chromasia (c) dichromasia (d) all of these.

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Correct option(a) monochromasia


Colour blindness is the inability of certain human beings to distinguish between colours. It is produced by an X-linked recessive gene by causing a lack of one of the primary cone pigments of the retina. Colour blindness in which all colours are perceived as grey is turned monochromasia. The person suffering from this disease is completely colour blind.

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