The gaseous furit ripening phytohromone is

Options

A. Ethylene
B. Kinetin
C. GA
D. ABA

Answer

**Step-by-Step Solution:**

1. **Understanding Phytohormones:**
- Phytohormones are plant hormones that regulate various physiological processes in plants. They are essential for growth, development, and responses to environmental stimuli.

2. **Identifying the Options:**
- The question presents four options:
- A) Ethylene
- B) Kinetine
- C) Gibberellic Acid (GA)
- D) Abscisic Acid (ABA)

3. **Analyzing Each Option:**
- **Ethylene:** This is a gaseous phytohormone known to play a crucial role in the fruit ripening process. It promotes the ripening of fruits and is often used commercially to accelerate ripening.
- **Kinetine:** This is a type of cytokinin, which is involved in cell division and growth but does not play a direct role in fruit ripening.
- **Gibberellic Acid (GA):** This hormone is primarily involved in promoting growth and elongation in plants, not specifically in fruit ripening.
- **Abscisic Acid (ABA):** This hormone is involved in stress responses and the regulation of stomatal closure, but it does not facilitate fruit ripening.

4. **Conclusion:**
- Based on the analysis, the correct answer is **A) Ethylene**, as it is the only hormone listed that directly facilitates the ripening of fruits.

**Final Answer:**
The gaseous fruit ripening phytohormone is **ethylene**.

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