Which of the following is an azo dye?

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(A) An azo dye is a compound containing the azo group,$-N=N-$,linked to aromatic rings. Methyl orange is a well-known azo dye used as an acid-base ind

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Methyl orange

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(A) An azo dye is a compound containing the azo group,$-N=N-$,linked to aromatic rings. Methyl orange is a well-known azo dye used as an acid-base indicator. Its chemical structure contains the $-N=N-$ linkage,which is characteristic of azo dyes.

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