The following carbohydrate is

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(B) The given structure is a six-membered cyclic form of a sugar,which is known as a pyranose ring.By observing the anomeric carbon $(C_1)$,the $-OH$

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An aldohexose

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(B) The given structure is a six-membered cyclic form of a sugar,which is known as a pyranose ring.By observing the anomeric carbon $(C_1)$,the $-OH$ group is in the downward position (axial),which corresponds to the $\alpha$-anomer.Since the sugar has six carbons and an aldehyde group (indicated by the presence of a hydrogen atom at the anomeric carbon),it is an aldohexose.Therefore,the structure represents $\alpha$-$D$-glucopyranose,which is an aldohexose.

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