Assertion` :-` Major part of `CO_(2)` is transported in the form of sodium bicarbonate.
Reason `:-` 0.3 ml of `CO_(2)` is transported per 100ml of blood in dissolved state in plasma of blood.

Options

A. If both Assertion & Reason are True & the Reasonn is a correct explanation of the Assertion .
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "the major part of CO₂ is transported in the form of sodium bicarbonate."
- It is known that approximately 70% of carbon dioxide (CO₂) in the blood is indeed transported in the form of bicarbonate ions (HCO₃⁻) after reacting with water and carbonic anhydrase in red blood cells.

2. **Understanding the Reason**:
- The reason states that "0.3 ml of CO₂ is transported per 100 ml of blood in dissolved state in plasma of blood."
- In reality, only about 5-7% of CO₂ is transported in a dissolved state in plasma, which is significantly less than the 0.3 ml stated. The majority of CO₂ is transported as bicarbonate ions.

3. **Evaluating the Truth of Each Statement**:
- The assertion is **true** because it accurately reflects that the major part of CO₂ is transported as bicarbonate.
- The reason is **false** because the amount of CO₂ transported in dissolved form is not accurately represented.

4. **Conclusion**:
- Since the assertion is true and the reason is false, the correct answer to the question is that the assertion is true but the reason is false.

### Final Answer:
- The assertion is true, and the reason is false. Therefore, the answer is option C.