Answer;
Fructose.
Explanation;
-Monosaccharide are the simplest or basic form or unit of sugar and are usually colorless, water-soluble, and crystalline solids. Some may have a sweet taste.
-They're composed of carbon, hydrogen, and oxygen atoms, and they cannot be broken down further since they are already in their simplest form.
Examples of monosaccharides include glucose, fructose, and galactose among others.