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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)

Ans. The answer is the option (b) Indigofera

Explanation: ‘Indigo’ is a blue colour. And Indigofera is used for blue dye.

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