Need help with these questions How would you best describe t

Need help with these questions

How would you best describe the relationship between the following compounds? Is there a relationship between them? Predict the optical activity and number of unique 13C NMR signals expected from each of the acetylated alditols shown below. optically active? (y/n) 13C NMR signals:

Solution

Pyranose Forms of the Hexoses

yes and yes