Which of the following is a vat dye and often used in dyeing jeans

1.	Which of the following is a vat dye and often used in dyeing jeans
A.	Indigo
B.	Alizarin
C.	Picric acid
D.	Crystal violet
Answer» B. Alizarin

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Which of the following is a vat dye and often used in dyeing jeans

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