What is the colour of the filter that can transmit blue and red colours of light?

Magenta

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Cyan

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Yellow

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Can be of any colour

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Solution

The correct option is A
Magenta

Blue, red, and green are the primary colours whereas cyan, yellow, and magenta are the secondary colours made by the different combinations of the primary colours.

Blue + Red = Magenta
Red + Green = Yellow
Blue + Green = Cyan

Hence, the colour of the filter that can transmit blue and red colours of light is magenta.

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