Which one is disaccharide ?

Options

A. Glucose
B. Cellulose
C. Maltose
D. Ribose.

Answer

To determine which of the given options is a disaccharide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Disaccharide**:
- A disaccharide is a type of carbohydrate that consists of two monosaccharide units linked together.

2. **Analyze the Options**:
- We have four options:
1. Glucose
2. Cellulose
3. Maltose
4. Ribose

3. **Identify Monosaccharides**:
- Glucose and ribose are both monosaccharides.
- Therefore, they cannot be disaccharides.

4. **Identify Polysaccharides**:
- Cellulose is a polysaccharide, which is made up of many monosaccharide units.
- Hence, it is not a disaccharide.

5. **Identify the Disaccharide**:
- Maltose is composed of two glucose units.
- Since it consists of two monosaccharides, maltose is classified as a disaccharide.

6. **Conclusion**:
- The correct answer is **maltose**, as it is the only disaccharide among the options provided.

### Final Answer:
**Maltose is the disaccharide.**