Which one of the following pairs, is not correctly matched

Options

A. Abscisic acid – Stomatal closure
B. Gibberellic acid – Leaf fall
C. Cytokinin – Cell division
D. IAA – Cell wall elongation

Explanation

To determine which pair is not correctly matched, we need to analyze each option provided in the question. Here’s a step-by-step breakdown of the analysis:

### Step 1: Analyze the first pair - FCC Acid
- **Definition**: FCC Acid (Abscisic Acid) is known as a stress hormone.
- **Function**: It is involved in stomatal closure during stress conditions (like drought).
- **Conclusion**: This pair is correctly matched.

### Step 2: Analyze the second pair - Gibralic Acid
- **Definition**: Gibralic Acid (Gibberellins) is a plant growth hormone.
- **Function**: It promotes growth and does not induce leaf fall; instead, it helps in elongation and growth of stems.
- **Conclusion**: This pair is not correctly matched as Gibralic Acid does not promote leaf fall.

### Step 3: Analyze the third pair - Cytokinin
- **Definition**: Cytokinins are plant hormones that promote cell division.
- **Function**: They are involved in various growth processes, including cell division and shoot development.
- **Conclusion**: This pair is correctly matched.

### Step 4: Analyze the fourth pair - Indole Acetic Acid
- **Definition**: Indole Acetic Acid (IAA) is an auxin, a type of plant hormone.
- **Function**: It promotes cell elongation and growth.
- **Conclusion**: This pair is correctly matched.

### Final Conclusion
After analyzing all the pairs, the second pair (Gibralic Acid - Leaf Fall) is not correctly matched. Therefore, the answer is the second option.

### Answer: The second pair (Gibralic Acid - Leaf Fall) is not correctly matched.

---