Plant medium used widely in preparation of culture medium is got from

Options

A. Cycas revoluta
B. Cocos nucifera
C. Pinus roxburghii
D. Borassus flabellifera.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the plant medium that is widely used in the preparation of culture medium. This involves identifying a plant source that provides a suitable medium for growing cultures.

2. **Analyzing the Options**: The options given are:
- A. Cycus revoluta
- B. Coccus nusifera
- C. Pinus roxburghi
- D. Boracus flabby leaffera

3. **Identifying the Correct Plant**:
- **Cycus revoluta**: This is a type of cycad and is not commonly used for culture media.
- **Coccus nusifera**: This is the scientific name for coconut. Coconut water is known to be rich in nutrients and growth hormones, making it suitable for culture media.
- **Pinus roxburghi**: This is a type of pine tree and is not typically used for culture media.
- **Boracus flabby leaffera**: This is not a widely recognized plant for culture media preparation.

4. **Conclusion**: Based on the analysis, **Coccus nusifera** (coconut) is the correct answer as it provides a nutrient-rich medium that is widely used in culture preparations due to its growth substances, particularly cytokinin.

5. **Final Answer**: The plant medium used widely in preparation of culture medium is got from **B. Coccus nusifera**.

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