Flowering of Chrysanthemum is inhibited by

Options

A. IAA
B. `GA_(3)`
C. Cytokinin
D. Ethylene.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which substance inhibits the flowering of the Chrysanthemum plant.

2. **Identifying the Options**: The options provided are:
- A) Indole Acetic Acid
- B) Gibberellic Acid
- C) Cytokinin
- D) Ethylene

3. **Analyzing Each Option**:
- **Indole Acetic Acid (IAA)**: This is a type of auxin, a plant hormone that is known to inhibit flowering in many plants, including Chrysanthemum. Thus, this option is likely correct.
- **Gibberellic Acid**: This hormone promotes growth and elongation of shoots and internodes, which suggests it does not inhibit flowering. Therefore, this option is incorrect.
- **Cytokinin**: This hormone is primarily involved in promoting cell division and does not inhibit flowering. Hence, this option is also incorrect.
- **Ethylene**: This hormone is associated with fruit ripening and does not inhibit flowering. Thus, this option is incorrect as well.

4. **Conclusion**: Based on the analysis, the correct answer is **Indole Acetic Acid (IAA)**, as it is responsible for inhibiting flowering in Chrysanthemum.

**Final Answer**: The flowering of Chrysanthemum is inhibited by **Indole Acetic Acid**.

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