Do all reducing sugars show mutarotation?
The compounds having hemiacetal in their structure give mutarotation.
Generally, all monosaccharides (glucose, fructose, ribose, arabinose, …) and disaccharides (lactose, maltose, …) give mutarotation, except sucrose.
Sucrose, despite being a disaccharide, fails to give mutarotation because it doesn't contain hemiacetal.