Reagent that confirms five -OH groups in glucose (acetic anhydride)

1. A.
   $NH_2OH$
2. B.
   $HCN$
3. C.
   dil. $HNO_3$
4. D.
   Acetic anhydride

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1. A.
   straight chain structure of glucose
2. B.
   presence of carbonyl group
3. C.
   presence of keto group
4. D.
   presence of five hydroxyl group

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