Hematin is

Options

A. Urochrome
B. Haemoglobin
C. Decomposed heamoglobin
D. Carbamino-haemoglobin.

Answer

### Step-by-Step Solution:

1. **Understanding Hematin**: Hematin is a compound that is derived from hemoglobin, which is an iron-containing protein found in red blood cells (erythrocytes).

2. **Structure of Hemoglobin**: Hemoglobin consists of four subunits: two alpha and two beta subunits. Each of these subunits is associated with a heme group, which contains an iron atom.

3. **Formation of Hematin**: Hematin is formed when hemoglobin undergoes decomposition. This process involves two key steps:
- The removal of the protein part of hemoglobin.
- The oxidation of the iron atom present in the heme group.

4. **Characteristics of Hematin**: Hematin is described as a bluish-black compound. This coloration is a result of its chemical structure after the decomposition of hemoglobin.

5. **Medical Use of Hematin**: Hematin is used as a medication to treat certain blood disorders. It helps alleviate symptoms associated with these conditions.

6. **Conclusion**: Based on the above information, hematin is identified as a compound derived from decomposed hemoglobin, making it the correct answer to the question.

### Final Answer:
Hematin is **decomposed hemoglobin**.

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