Which one of the following is capable of carrying oxygen ?

Options

A. Plasma
B. Blood
C. Serum
D. Lymph

Answer

To determine which of the following options is capable of carrying oxygen, we need to analyze each option provided: plasma, blood, serum, and lymph.

### Step-by-Step Solution:

1. **Understanding the Components**:
- **Plasma**: This is the liquid component of blood that carries various substances, including nutrients, hormones, and waste products, but it does not carry oxygen in significant amounts.
- **Blood**: Blood is composed of various components, including red blood cells (RBCs), white blood cells, platelets, and plasma. The key component for oxygen transport is the red blood cells.
- **Serum**: This is the liquid that remains after blood has clotted and does not contain cells. It also does not carry oxygen.
- **Lymph**: This is a fluid that is part of the lymphatic system and primarily helps in immune functions and transporting fats, but it does not carry oxygen.

2. **Identifying the Key Component**:
- The red blood cells (RBCs) in blood contain a protein called hemoglobin. Hemoglobin has a high affinity for oxygen, allowing it to bind with oxygen in the lungs and transport it to tissues throughout the body.

3. **Conclusion**:
- Among the options given, **blood** is the only one capable of carrying oxygen due to the presence of red blood cells and hemoglobin.

### Final Answer:
**Blood** is capable of carrying oxygen.

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