The core metal of chlorophyll is:-

Options

A. iron
B. magnesium
C. nickel
D. copper

Explanation

**Step-by-Step Solution:**

1. **Understanding Chlorophyll**: Chlorophyll is a green pigment found in plants, primarily in the leaves and young stems. It plays a crucial role in photosynthesis, the process by which plants convert sunlight into energy.

2. **Identifying the Function of Chlorophyll**: The main function of chlorophyll is to absorb light, primarily sunlight, which is then used to convert carbon dioxide and water into glucose, a form of sugar that serves as food for the plant.

3. **Structure of Chlorophyll**: Chlorophyll consists of two main parts:
- The **porphyrin head**, which contains the core metal.
- The **phytol tail**, which helps anchor the chlorophyll molecule in the thylakoid membranes of chloroplasts.

4. **Determining the Core Metal**: The core metal in the porphyrin head of chlorophyll is essential for its function. The options given are iron, magnesium, nickel, or copper.

5. **Conclusion**: The correct answer is magnesium, as it is the metal present in the core of chlorophyll that plays a vital role in its ability to absorb light and facilitate photosynthesis.

**Final Answer**: The core metal of chlorophyll is magnesium.

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