Anomers include alpha-D-glucose and beta-D-glucose, for example.
The structure of anomeric saccharide changes at only the anomeric carbon. Anomeric carbon refers to the carbohydrate’s functional component, the carboxylic group. A stereoisomer is a type of anomer. They have different configurations at C-2. If they’re ketones, or if they’re aldoses in the C-1 configuration.
Option C is the right answer.