Alongwith auxin, another hormone is used in culture technique. It is

Options

A. Gibberellin
B. Cytokinin
C. Ethylene
D. Coumarin

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for another hormone that is used alongside auxin in culture techniques.

2. **Understand the Role of Auxin**: Auxin is a plant hormone that plays a crucial role in the growth and elongation of roots and shoots. It is commonly used in plant tissue culture.

3. **Explore Other Plant Hormones**: In addition to auxin, there are several other hormones that can be used in plant tissue culture, including gibberellins, cytokinins, ethylene, and coumarin.

4. **Determine the Correct Hormone**: Among the options provided:
- **Gibberellin**: Primarily involved in stem elongation and seed germination.
- **Cytokinin**: Promotes cell division and is often used in conjunction with auxin in tissue culture.
- **Ethylene**: Mainly associated with fruit ripening.
- **Coumarin**: A plant-derived product used in the pharmaceutical industry, not primarily a growth regulator.

5. **Conclusion**: The hormone that is used alongside auxin in culture techniques is **cytokinin**. This hormone is essential for promoting cell division and works synergistically with auxin to establish and regenerate plant cultures.

**Final Answer**: Cytokinin

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