Chloride ions are required for –

Options

A. Splitting of water to liberate oxygen during photosynthesis
B. Pollen germination
C. Carbohydrate Translocation
D. Both (2) & (3)

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Chloride Ions:**
Chloride ions (Cl-) are classified as micronutrients essential for various physiological processes in plants. They play a significant role in photosynthesis and other metabolic functions.

2. **Analyzing the Options:**
- **Option 1:** Splitting of water to liberate oxygen during photosynthesis.
- **Option 2:** Pollen germination.
- **Option 3:** Carbohydrate translocation.
- **Option 4:** Both 2 and 3.

3. **Evaluating Each Option:**
- **Option 1:** Chloride ions are involved in the process of photosynthesis, specifically in the splitting of water molecules (photolysis) which releases oxygen. This process is crucial for the overall photosynthetic activity in plants.
- **Option 2:** Pollen germination is primarily influenced by other factors such as water availability and hormonal signals. While chloride ions may play a minor role, they are not essential for this process.
- **Option 3:** Carbohydrate translocation involves the movement of sugars through the plant and is mainly regulated by other nutrients and hormones, not specifically chloride ions.
- **Option 4:** Since both options 2 and 3 are not directly related to the requirement of chloride ions, this option is also incorrect.

4. **Conclusion:**
Based on the analysis, the correct answer is **Option 1: Splitting of water to liberate oxygen during photosynthesis.** Chloride ions are indeed required for this process.