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A sugar ‘X’ dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product

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A sugar ‘X’ dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ‘X’ is

(A) Aldopentose

(B) Aldotetrose

(C) Oxalic acid

(D) Ketotetrose

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Correct option is (A) Aldopentose

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