Commercial cork is obtained from

Options

A. (a) Mango
B. (b) Oak (Quercus suber0
C. (c) Ficus religiosa
D. (d) Pinus

Answer

**Step-by-Step Solution:**

1. **Understanding Cork**: Cork is a material that is widely used in various applications such as bottle stoppers, flooring, and insulation due to its unique properties like being lightweight, water-repellent, and having thermal insulating capabilities.

2. **Composition of Cork**: The main component of cork is a substance called suberin, which is hydrophobic (water-repellent) and contributes to the cork's insulating properties.

3. **Source of Commercial Cork**: The commercial cork is primarily harvested from the cork cambium layer of certain trees. The cork cambium is a layer of tissue in the bark that produces cork cells.

4. **Identifying the Correct Tree**: Among the options provided:
- **A. Mango**: This tree is primarily known for its fruit and does not produce commercial cork.
- **B. Oak**: The scientific name for the cork oak is *Quercus suber*, which is known for its high-quality cork production. This is the correct answer.
- **C. Ficus religiosa**: This is the scientific name for the banyan tree, which does not produce commercial cork.
- **D. Pinus**: This refers to pine trees, which produce a different type of cork that is not suitable for commercial use.

5. **Conclusion**: Based on the analysis of the options, the correct answer is **B. Oak**.

**Final Answer**: Commercial cork is obtained from **Oak** (scientific name: *Quercus suber*).

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