Select the incorrect statement :-

Options

A. `Zn^(2+)`is needed for Auxin synthesis
B. Fe is activator for catalase enzyme
C. K is required in more abundant amount in meristematic tissue, buds, leaves and roots tips
D. `Ca^(++)` & `Cl^(–)` are mainly related to cation anion balance

Answer

To solve the question of selecting the incorrect statement regarding nutrients in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Nutrient Categories**:
- Nutrients are divided into macronutrients (needed in larger quantities) and micronutrients (needed in smaller quantities). Both are essential for various metabolic processes in plants.

2. **Analyze Each Statement**:
- **Statement 1**: "Zinc is needed for oxygen synthesis."
- This statement is correct as zinc is involved in the synthesis of certain enzymes that are crucial for photosynthesis, which produces oxygen.

- **Statement 2**: "Iron is an activator for catalyzed enzymes."
- This statement is also correct. Iron is a key component of many enzymes and is essential for their activation.

- **Statement 3**: "Potassium is required in more abundant amounts in meristematic tissue."
- This statement is correct as potassium is vital for cell division and growth, particularly in meristematic tissues where active growth occurs.

- **Statement 4**: "Calcium and chlorine are mainly related to cation and anion balance."
- This statement is incorrect. While calcium is a cation and plays a role in cell wall structure and stability, chlorine is primarily involved in osmotic balance and photosynthesis, not specifically for balancing cations and anions.

3. **Identify the Incorrect Statement**:
- After analyzing all statements, the fourth statement about calcium and chlorine is incorrect.

### Final Answer:
The incorrect statement is: **"Calcium and chlorine are mainly related to cation and anion balance."**

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