Under suitable mild conditions, which of the following couple with benzenediazonium chloride to give azo compounds?

Aphenol in alkaline medium
B2-naphthol in alkaline medium
Cbenzene
DN,N-dimethylaniline at pH 4-5

Answer: A, B, D

Strongly activated rings (phenoxide, naphthoxide, dialkylamino-substituted benzene) couple with the weak diazonium electrophile. Benzene is not activated and does not couple.

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