Number of carbon in ring of deoxyribose sugar is `:`

Options

A. Three
B. Four
C. Five
D. Six.

Answer

To determine the number of carbon atoms in the ring of deoxyribose sugar, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Deoxyribose Sugar**:
- Deoxyribose is a pentose sugar, which means it has five carbon atoms in total. However, we need to focus on the ring structure.

2. **Understand the Ring Formation**:
- Deoxyribose can exist in a cyclic form. In its ring structure, it typically forms a furanose ring, which is a five-membered ring.

3. **Count the Carbon Atoms in the Ring**:
- In the furanose form of deoxyribose, there are four carbon atoms in the ring. The fifth carbon is part of the chain that is outside the ring structure.

4. **Conclusion**:
- Therefore, the number of carbon atoms in the ring of deoxyribose sugar is **4**.

### Final Answer:
The number of carbon atoms in the ring of deoxyribose sugar is **4**.

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