Name the metal present in haemoglobin.

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Compound**: The question asks for the metal present in hemoglobin. Hemoglobin is a crucial protein found in red blood cells.

2. **Understand the Function of Hemoglobin**: Hemoglobin is responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the body back to the lungs.

3. **Determine the Composition of Hemoglobin**: Hemoglobin is made up of four subunits, each containing a heme group. The heme group is important for its oxygen-carrying capacity.

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