The hydrochloric acid-catalyzed reaction of either α-D-ribose or β-D-ribose with excess methanol produces a mixture of α and β anomers of methyl D-ribofuranoside. Illustrate the reactants, reagents, and products for the reaction. Identify the aglycone in the products by circling it.

• A.
• B.
• C.
• D.

Answer: (A)