Question: Identify A, B, C, and D in the preceding problem if D is oxidized to an optically inactive aldaric acid, A, B, and C are

Identify A, B, C, and D in the preceding problem if D is oxidized to an optically inactive aldaric acid, A, B, and C are oxidized to optically active aldaric acids, and interchanging the aldehyde and alcohol groups of A leads to a different sugar.

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