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Which of the following plants is used to extract the blue dye?

(a) Trifolium

(b) Lupin

(c) Indigofera

(d) Cassia

Answers (1)

‘Indigo’ is a blue colour. And Indigofera is used for blue dye.
Some of the plants belonging to the genus Indigofera are used to extract the blue dye (indigo dye). Their leaves are utilised for this purpose.

The answer is the option (b) Indigofera.

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Safeer PP

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