A dark reddish brown scam formed athteh site of cut or an injury over a period of time which is called

Options

A. Clot
B. Scar
C. Coagulum
D. Both A and C

Explanation

To answer the question about the dark reddish-brown scum formed at the site of a cut or injury, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Injury Response**:
- When there is a cut or injury to the skin, the body initiates a response to prevent blood loss.

2. **Role of Blood in Injury**:
- Blood plays a crucial role in this process. It contains components that help in the healing process.

3. **Coagulation Process**:
- The process that occurs in response to injury is known as coagulation or clotting. This is when blood changes from a liquid to a gel-like state to form a clot.

4. **Formation of the Clot**:
- As the blood coagulates, it forms a dark reddish-brown scum at the site of the injury. This scum is essentially the clot that prevents excessive blood loss.

5. **Terminology**:
- The dark reddish-brown scum formed is referred to as a "clot." It can also be called a "coagulum."

6. **Conclusion**:
- Therefore, the answer to the question is that the dark reddish-brown scum formed at the site of a cut or injury is called a "clot" or "coagulum." The correct option is both A (clot) and C (coagulum).

### Final Answer:
The dark reddish-brown scum formed at the site of a cut or injury is called a "clot" or "coagulum." The correct answer is option 4, which states both A and C.