Sugars that would yield the same phenylosazone are:

Question

Quizplus · Accepted Answer

In order for two sugars to yield the same phenylosazone, they must have the same functional groups and arrangement of atoms. 
I: Glucose - This sugar has a ketone group at the second carbon and an alcohol group at the fifth carbon. 
II: Fructose - This sugar has a ketone group at the second carbon and an alcohol group at the third carbon. 
III: Mannose - This sugar has a ketone group at the second carbon and an alcohol group at the sixth carbon. 
All three of these sugars have the same functional groups and arrangement of atoms, and therefore would yield the same phenylosazone. Therefore, the correct choice is C.

Sugars That Would Yield the Same Phenylosazone Are