Which of the following is an azo dye [Delhi CEE 1996]

1.	Which of the following is an azo dye [Delhi CEE 1996]
A.	Orange-I
B.	Phenolphthalein
C.	Malachite green
D.	Methylene blue
Answer» B. Phenolphthalein

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Which of the following is an azo dye [Delhi CEE 1996]

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