Which of the following sugars exhibits mutarotation in aqueous solution?

Step-by-step solution

Mutarotation is the phenomenon of change in specific rotation of an optically active compound in solution with time, reaching an equilibrium value. It is exhibited by reducing sugars that possess a free hemiacetal or hemiketal group. In aqueous solution, these cyclic forms can open into an open-chain structure and reclose, leading to an equilibrium mixture of and anomers. Glucose and fructose are monosaccharides with free hemiacetal and hemiketal groups, respectively, so they undergo mutarotation. Lactose is a redu