Chemical for arresting cell division is extracted from

Options

A. Crocus
B. Colchicum
C. Chrysanthemum
D. Dalbergia

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the source of a chemical that can arrest cell division. This means we need to identify a plant from which a known mitotic inhibitor is extracted.

2. **Identifying the Options**: The options provided are:
- Crocus
- Colchicum
- Chrysanthemum
- Dalbergia

3. **Researching Each Option**:
- **Crocus**: This is a genus of flowering plants, and one of its extracts is saffron, which is known for its medicinal properties but does not arrest cell division.
- **Colchicum**: This plant is known for producing colchicine, a chemical that inhibits cell division by preventing spindle fiber formation during mitosis.
- **Chrysanthemum**: This plant has various medicinal uses, such as anti-inflammatory properties, but it does not have any known effect on cell division.
- **Dalbergia**: Commonly known as Indian rosewood, it is primarily valued for its timber and has some medicinal uses, but it does not arrest cell division.

4. **Conclusion**: Among the options, colchicine extracted from the plant Colchicum is the chemical that arrests cell division by inhibiting the formation of spindle fibers, thus preventing proper chromosome segregation.

5. **Final Answer**: The correct answer is **Colchicum**.

---