Which of the following electrolytes present in the saliva of human ?

Options

A. `Na^(+)`
B. `K^(+)`
C. `Cl^(-)`
D. above all

Answer

To answer the question "Which of the following electrolytes are present in the saliva of humans?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Saliva Composition**:
- Saliva is primarily composed of water (about 99.5%), but it also contains various electrolytes and other substances that play important roles in digestion and oral health.

2. **Identifying Electrolytes in Saliva**:
- The key electrolytes found in human saliva include:
- Sodium (Na⁺)
- Potassium (K⁺)
- Chloride (Cl⁻)
- Other electrolytes such as calcium, magnesium, bicarbonate, and phosphate are also present.

3. **Analyzing the Options**:
- The options provided are:
- A) Sodium
- B) Potassium
- C) Chloride
- D) All of the above
- Since sodium, potassium, and chloride are all confirmed to be present in saliva, we can conclude that the correct answer is option D.

4. **Conclusion**:
- Therefore, the answer to the question is **D) All of the above**.