One of the commonly used plant growth hormone is pineapple to promote flowering is

Options

A. ethylene
B. abscisic acid
C. zeatin
D. indole-3-acetic acid

Answer

To solve the question regarding the plant growth hormone commonly used in pineapples to promote flowering, we will analyze the options provided and identify the correct hormone step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a plant growth hormone that is commonly used in pineapples to promote flowering.

2. **Review the Options**: The options given are:
- A) Ethylene
- B) Abscisic Acid
- C) Jatin
- D) Indole-3 Acetic Acid

3. **Analyze Each Hormone**:
- **Ethylene**: This is a gaseous hormone primarily responsible for the ripening of fruits. While it plays a role in fruit development, it is not specifically known for promoting flowering in pineapples.

- **Abscisic Acid (ABA)**: Known as the stress hormone, ABA is involved in responses to stress conditions like drought. It helps in closing stomata to prevent water loss and is not associated with promoting flowering.

- **Jatin**: This option seems to be a misrepresentation or confusion with "Cytokinins," which promote cell division but are not specifically known for promoting flowering in pineapples.

- **Indole-3 Acetic Acid (IAA)**: This is a natural auxin that plays a significant role in various plant growth processes, including promoting flowering. It is specifically noted for its role in inducing flowering in pineapples.

4. **Identify the Correct Answer**: Based on the analysis, the hormone that promotes flowering in pineapples is **Indole-3 Acetic Acid (IAA)**.

5. **Final Answer**: The correct option is **D) Indole-3 Acetic Acid**.