Which of the following are natural dyes:

alizarin, carminic acid and tartrazine

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indigo, bixin and alizarin

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tartrazine, FD&C Blue #1, and indigo

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chlorophyll, yellow #6 and haematin

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Solution

The correct option is C indigo, bixin and alizarin
Natural dyes are dyes derived from animal or plant material without any chemical treatment. They are obtained from sources like flowers,
leaves, insects, bark roots etc.; however, they are not readily
available and involve an extraction process.In th above question and the natural dyes are indigo, bixin and alizarin.
Hence option B is correct.

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