Which of the following carbohydrates is not monosaccharide ?

Options

A. Glucose
B. Fructose
C. Galactose
D. Sucrose

Answer

To determine which of the following carbohydrates is not a monosaccharide, we need to understand what a monosaccharide is. Monosaccharides are the simplest form of carbohydrates and cannot be hydrolyzed into simpler sugars. They consist of single sugar units.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides a list of carbohydrates. We need to analyze each one to determine if it is a monosaccharide or not.

2. **Analyze Glucose**:
- Glucose is a simple sugar and is classified as a monosaccharide.
- Conclusion: Glucose is a monosaccharide.

3. **Analyze Fructose**:
- Fructose is another simple sugar and is also classified as a monosaccharide.
- Conclusion: Fructose is a monosaccharide.

4. **Analyze Galactose**:
- Galactose is similarly a simple sugar and is classified as a monosaccharide.
- Conclusion: Galactose is a monosaccharide.

5. **Analyze Sucrose**:
- Sucrose is a carbohydrate made up of two monosaccharides: glucose and fructose.
- Since it consists of two sugar units, it is classified as a disaccharide.
- Conclusion: Sucrose is not a monosaccharide.

6. **Final Answer**:
- Among the options provided, Sucrose is the carbohydrate that is not a monosaccharide.

### Conclusion:
The carbohydrate that is not a monosaccharide is **Sucrose**.