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B
α naphthol in alchol
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C
Reasrcinol in alchol
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D
Rosaniline in water
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Solution
The correct option is Cα naphthol in alchol
Molisch's reagent: α -naphthol dissolved in ethanol. It is used in a chemical test for the presence of carbohydrates, based on the dehydration of the carbohydrate to aldehyde by action of acid.