Account for the following:

These are the options for the question :Account for the following:

a. There are 5 OH groups in glucose
b. Glucose is a reducing sugar

The correct answer is -a. Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five –OH groups. Since it exists as a stable compound, five –OH groups should be attached to different carbon atoms

b.Glucose reduces Fehlings reagent