Which of the following options shows a pair of antagonist Phytohormones with respect to the given feature ?

Options

A. Parthencarpy : Auxin antagonist to Gibberellin
B. Abscission : Ethylene antagonist to Abscisic acid
C. Seed Germination : Gibberellin antagonist to Abscisic acid
D. Senescence : Gibberellin antagonist to Cytokinin

Answer

To solve the question regarding which pair of phytohormones are antagonistic with respect to a specific feature, we will analyze each option provided:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Antagonistic Hormones**: These are hormones that have opposing effects on a particular physiological process.
- **Phytohormones**: These are plant hormones that regulate various functions in plants.

2. **Analyze Each Option**:
- **Option A: Parthenocarpy (Auxin vs. Gibberellin)**:
- Parthenocarpy is the development of fruit without fertilization.
- Both auxins and gibberellins promote parthenocarpy.
- **Conclusion**: Not antagonistic (Incorrect).

- **Option B: Abscission (Ethylene vs. Abscisic Acid)**:
- Abscission is the shedding of plant parts.
- Both ethylene and abscisic acid promote abscission.
- **Conclusion**: Not antagonistic (Incorrect).

- **Option C: Seed Germination (Gibberellin vs. Abscisic Acid)**:
- Gibberellins promote seed germination, while abscisic acid inhibits it.
- **Conclusion**: They are antagonistic (Correct).

- **Option D: Senescence (Gibberellin vs. Cytokinin)**:
- Senescence is the aging process in plants.
- Both gibberellins and cytokinins inhibit senescence.
- **Conclusion**: Not antagonistic (Incorrect).

3. **Final Answer**:
- The correct option that shows a pair of antagonist phytohormones is **Option C: Seed Germination (Gibberellin vs. Abscisic Acid)**.