Understanding anomers:
Anomers are a type of isomer found in cyclic sugars, which differ in the orientation of the hydroxyl group (-OH) attached to the anomeric carbon (the carbon that was part of the carbonyl group in the open-chain form).
In Option A, the two groups (-OH) on the anomeric carbon are oriented differently, making it an anomer.
Option C also represents a sugar in which the orientation of the -OH group on the anomeric carbon differs, making it another anomer.
Thus, the correct answer is option (3).