Which of the Following Compounds is a D-Aldohexose

Question

Which of the following compounds is a D-aldohexose?
A) D-xylose
B) D-lyxose
C) D-talose
D) D-psicose

Accepted Answer

D-aldohexoses are stereoisomers of glucose, which have six carbons and an aldehyde functional group. Out of the given options, only D-talose is a D-aldohexose. D-xylose and D-lyxose are D-pentoses, which have five carbons, and D-psicose is a D-aldohexose, but it has a ketone functional group instead of an aldehyde.