cork/bottle cork is formed from

Options

A. Pterocarpus santalinus
B. Quercus suber
C. Shorea robusta
D. Hemotoxylon campechianum

Answer

To answer the question "Cork/bottle cork is formed from," we need to identify the correct source of cork among the given options.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Pterocarpus santalinus
- Quercus suber
- Shorea robusta
- Hematoxylum campechianum

2. **Research Each Option**:
- **Pterocarpus santalinus**: This is known as red sandalwood. It is primarily used for its wood, which has medicinal properties but is not a source of cork.
- **Quercus suber**: This is known as cork oak. It is specifically recognized as the primary source of cork, which is used for bottle stoppers and other applications.
- **Shorea robusta**: This tree is known for its wood and is used in ointments and foot care products, but it does not produce cork.
- **Hematoxylum campechianum**: This tree is known for its dye-producing properties and is not related to cork production.

3. **Conclusion**: After analyzing the options, it is clear that the cork or bottle cork is formed from **Quercus suber**.

### Final Answer:
Cork/bottle cork is formed from **Quercus suber**.

---