Select out the incorrect match –

Options

A. Indole compounds – NAA
B. Adenine derivatives – Cytokinin
C. Carotenoid derivatives – Ethylene
D. Terpenes – GA

Answer

To solve the question of selecting the incorrect match among the given plant hormones and their derivatives, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Options**: We have four options that pair a type of compound with a plant hormone. We need to evaluate each pair to determine if they are correctly matched.

2. **Evaluate Option 1**:
- **Indole Compound**: NAA (Naphthalene Acetic Acid) is an indole compound.
- **Function**: NAA acts as a growth promoter in plants.
- **Conclusion**: This is a correct match.

3. **Evaluate Option 2**:
- **Adenine Derivative**: Cytokinin is derived from adenine.
- **Function**: Cytokinins promote cell division in plants.
- **Conclusion**: This is also a correct match.

4. **Evaluate Option 3**:
- **Carotenoid Derivative**: The option states that ethylene is a carotenoid derivative.
- **Fact Check**: Ethylene is actually a terpene derivative, not a carotenoid.
- **Conclusion**: This is an incorrect match.

5. **Evaluate Option 4**:
- **Terpene Derivative**: Gibberellic acid is a terpene derivative.
- **Conclusion**: This is a correct match.

6. **Final Conclusion**: Based on the evaluations, the incorrect match is found in Option 3, where ethylene is incorrectly classified as a carotenoid derivative.

### Answer:
The incorrect match is Option 3: Ethylene is a carotenoid derivative.

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