Liver is a source of -

Options

A. Iron
B. Water
C. magnesium
D. All of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about what the liver is a source of. We need to identify the nutrients or elements that are abundant in the liver.

2. **Analyzing the Options**: The options provided are:
- Option 1: Iron
- Option 2: Water
- Option 3: Magnesium
- Option 4: All of these

3. **Identifying Nutritional Content of Liver**: The liver is known to be a nutritionally dense food. It contains several important nutrients, including:
- Iron
- Vitamin B
- Vitamin A
- Copper

4. **Evaluating Each Option**:
- **Iron**: The liver is indeed a rich source of iron, which is essential for blood production and overall health.
- **Water**: While the liver contains some water, it is not primarily known as a source of water.
- **Magnesium**: The liver does contain magnesium, but it is not as significant a source as iron.
- **All of these**: This option suggests that the liver is a source of iron, water, and magnesium, but since water is not a primary nutrient found in high amounts in the liver, this option is not accurate.

5. **Conclusion**: Based on the analysis, the best answer is Option 1: Iron, as the liver is particularly known for its high iron content.

**Final Answer**: The liver is a source of Iron.

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