Find out the correctly matched pair

Options

A. Nutrients -Zinc, Functions -Helps to maintain the ribosome structure
B. Nutrients -Magnesium, Functions -Needed during the formation of mitosis spindle
C. Nutrients -Calcium, Functions -Plays a role in the opening and closing of stomata
D. Nutrients -Maganese, Functions -Needed in the splitting of water to liberate oxygen during photosynthesis

Answer

To find the correctly matched pair from the given options, we need to analyze each option carefully.

### Step-by-step Solution:

1. **Analyze Option 1: Zinc**
- Nutrient: Zinc
- Function: Helps to maintain the ribosome structure.
- **Evaluation**: This is incorrect. Zinc is not primarily responsible for maintaining ribosome structure; magnesium is the nutrient that serves this function.

2. **Analyze Option 2: Magnesium**
- Nutrient: Magnesium
- Function: Necessary for the mitosis spindle formation.
- **Evaluation**: This is also incorrect. Magnesium does not play a direct role in mitosis spindle formation; it is more associated with ribosome structure.

3. **Analyze Option 3: Calcium**
- Nutrient: Calcium
- Function: Involved in the opening and closing of stomata.
- **Evaluation**: This is incorrect as well. The nutrient responsible for the opening and closing of stomata is potassium, not calcium.

4. **Analyze Option 4: Manganese**
- Nutrient: Manganese
- Function: Helps in the splitting of water during photosynthesis.
- **Evaluation**: This is correct. Manganese is indeed involved in the process of water splitting, which releases oxygen during photosynthesis.

### Conclusion:
The correctly matched pair is:
- Nutrient: Manganese
- Function: Helps in the splitting of water during photosynthesis.