Hormone responsible for ageing is

Options

A. GA
B. IAA
C. ABA
D. Cytokinin

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the hormone responsible for aging in plants.

2. **Review the Options**: The options provided include various plant hormones such as gibberellins, indole acetic acid (IAA), and abscisic acid (ABA).

3. **Understand the Functions of Each Hormone**:
- **Gibberellins**: These hormones are primarily involved in promoting growth and cell elongation. They help in processes like seed germination and stem elongation.
- **Indole Acetic Acid (IAA)**: This is a type of auxin that also promotes cell elongation and division, playing a key role in plant growth.
- **Abscisic Acid (ABA)**: This hormone is known for its role in stress responses, such as drought and salinity, and is also associated with the aging process in plants.

4. **Determine the Correct Answer**: Among the hormones listed, abscisic acid (ABA) is specifically noted for its role in aging and stress responses. Therefore, the hormone responsible for aging is **abscisic acid (ABA)**.

5. **Conclusion**: The correct answer to the question is abscisic acid (ABA), as it is the hormone linked to the aging process in plants.

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