Which one of the following is a disaccharide : Starch , Maltose , Fructose, Glucose?

Explanation

To determine which of the given options is a disaccharide, we need to understand the definitions of the terms involved.

### Step 1: Understand the definition of a disaccharide
A disaccharide is a carbohydrate composed of two monosaccharide units linked together by a glycosidic bond. Common examples of disaccharides include sucrose, lactose, and maltose.

### Step 2: Analyze the options
1. **Starch**: Starch is a polysaccharide, which means it is made up of many glucose units. It is not a disaccharide.

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