Specify the relationship(s) of the compounds in each of the following sets. Choose among the following terms: identical compounds, epimers, anomers, enantiomers,
diastereomers, constitutional isomers, none of
the above. (More than one answer may be correct.)
(a) α-D-glucopyranose and α-D-rnannopyranose
(b) α-D-ribofuranose and α-n-ribopyranose
(c) Methyl a-n-fructofuranoside and 2-O-methyl-a-Dfructofuranose