The buffer salts present in the blood are

Options

A. Potassium
B. Sodium
C. Sodium and potassium
D. Cobalt

Explanation

To answer the question regarding the buffer salts present in the blood, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Buffer Salts**: Buffer salts are substances that help maintain the pH balance in the blood by neutralizing acids and bases. They play a crucial role in physiological processes.

2. **Identifying Key Buffer Salts in Blood**: The primary buffer salts in the blood include bicarbonate (HCO3-), phosphate (HPO4^2-), and proteins. However, the question specifically mentions sodium and potassium.

3. **Role of Sodium and Potassium**: Sodium (Na+) and potassium (K+) are electrolytes that help in maintaining osmotic balance and are involved in nerve impulse transmission and muscle contraction. They also contribute to the acid-base balance in the body.

4. **Conclusion**: The main buffer salts present in the blood that are relevant to the question are sodium and potassium. They help in maintaining the acid-base balance, which is essential for proper physiological function.

5. **Final Answer**: The buffer salts present in the blood are Sodium and Potassium.