Which of the following is known as leavulose sugar?

The answer is (2) fructose.

Fructose is also known as levulose because it rotates the plane of polarized light in the left direction. It is a ketose sugar, which means that it has a ketone group. Fructose is the sweetest of all naturally occurring sugars and is found in fruits, honey, and nectar.

Glucose, sucrose, and arabinose are all aldose sugars, which means that they have an aldehyde group. Glucose is the most common sugar in the human body and is used as a source of energy. Sucrose is a disaccharide that is made up of glucose and fructose. Arabinose is a pentose sugar that is found in RNA.