Both glucose and fructose are hexoses, glucose makes a _whereas fructose make a_in a solution, respectively:

Explanation

"Furan" is a term used in organic chemistry to refer to a heterocyclic compound that consists of a five-membered ring containing four carbon atoms and one oxygen atom. The structure of furan is a closed ring, with the oxygen atom at one of the carbon positions. Pyranose refers to a six-membered ring structure containing five carbon atoms and one oxygen atom. This ring structure is commonly found in sugars, especially in the context of carbohydrates like glucose and fructose.The pyranose ring structure is a cyclic form formed through the reaction of a carbonyl group (such as in an aldose or ketose sugar) with a hydroxyl group on another carbon atom within the same molecule.