pentoses are insoluble in water as they are

Options

A. Oilgosaccharides
B. Disaccharides
C. Monosacchrides
D. Polysaccharides.

Answer

To solve the question "Pentoses are insoluble in water as they are:", we will analyze the options provided and determine which one correctly identifies pentoses.

### Step-by-Step Solution:

1. **Understanding Pentoses**:
- Pentoses are a type of monosaccharide that contain five carbon atoms. They are simple sugars and include examples such as ribose and deoxyribose.

2. **Analyzing the Options**:
- **Option A: Oligosaccharides**: These are carbohydrates made up of 3 to 20 monosaccharide units. This does not apply to pentoses specifically.
- **Option B: Disaccharides**: These are carbohydrates formed from two monosaccharide units. Again, this does not apply to pentoses.
- **Option C: Monosaccharides**: Pentoses fall under this category as they are simple sugars with five carbon atoms.
- **Option D: Polysaccharides**: These are large molecules made up of more than 20 monosaccharide units. Pentoses do not fit this classification.

3. **Conclusion**:
- Since pentoses are classified as monosaccharides, and they are known to be insoluble in water, the correct answer is **Option C: Monosaccharides**.

### Final Answer:
Pentoses are insoluble in water as they are **monosaccharides**.

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