MCQ
Which of the following pair is $C_2$ -epimer ?
- A$D-$ Glucose, $D-$ Maltose
- ✓$D-$ Glucose, $D-$ Mannose
- C$D-$ Allose, $D-$ Ribose
- D$D-$ Glucose, $D-$ Arabinose

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$CH_3CHO + HCN \to CH_3CH(OH)CN \xrightarrow{H-OH} CH_3CH(OH)COOH$
