Hormone used in tissue culture for better growth is

Options

A. Gibberellin
B. Auxin
C. Cytokinin
D. Both B and C.

Answer

**Step-by-Step Solution:**

1. **Understanding Tissue Culture**: Tissue culture is a technique used to grow plants in a controlled environment, often using a nutrient medium. It allows for the propagation of plants from a small piece of tissue.

2. **Role of Hormones in Tissue Culture**: In tissue culture, plant hormones play a crucial role in promoting growth and development. The two main types of hormones involved are auxins and cytokinins.

3. **Auxins**: Auxins are hormones that promote root formation. When a plant tissue, such as a callus (a mass of undifferentiated cells), is treated with auxins, it encourages the development of roots.

4. **Cytokinins**: Cytokinins are hormones that promote cell division and differentiation. When a callus is treated with cytokinins, it leads to the development of stems and other plant structures.

5. **Conclusion**: Since both auxins and cytokinins are used in tissue culture to enhance growth—auxins for rooting and cytokinins for stem development—the correct answer to the question is option D, which states that both B (Auxin) and C (Cytokinin) are used.

**Final Answer**: The hormone used in tissue culture for better growth is option D: Both B (Auxin) and C (Cytokinin).

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