Give the classification of monosaccharides.

(N/A) Monosaccharides are classified based on two criteria:
$1$. Based on the number of carbon atoms: If a monosaccharide contains $3$ carbon atoms,it is called a triose; $4$ carbon atoms,a tetrose; $5$ carbon atoms,a pentose; and $6$ carbon atoms,a hexose.
$2$. Based on the functional group present: If the monosaccharide contains an aldehyde group $(-CHO)$,it is called an aldose. If it contains a ketone group $(>C=O)$,it is called a ketose.
These two classifications are often combined,for example,an aldohexose (an aldehyde with $6$ carbons) or a ketopentose (a ketone with $5$ carbons).