The correct option is
B ketohexose
Fructose is an important ketohexose. A ketohexose, in contrast, is a hexose with a ketone functional group located in position 2.
It is obtained along with glucose by the hydrolysis of disaccharide, sucrose. It is a natural monosaccharide found in fruits, honey, and vegetables. In its
pure form, it is used as a sweetener. It belongs to D-series and is a laevorotatory compound. Hence, the correct answer is option (b).