Assertion `:-` The volume of air a person can expire after normal inspiration is TV `=` ERV
Reason `:-` Volume of air that will remain in the lungs after a normal expiration is ERV `=` RV

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 1: Evaluate the Assertion
The assertion states: "The volume of air a person can expire after normal inspiration is TV = ERV."

- **Tidal Volume (TV)** is defined as the amount of air that is inhaled or exhaled during normal breathing, which is typically around 500 ml in a healthy adult.
- **Expiratory Reserve Volume (ERV)** is the amount of air that can be forcibly exhaled after the end of a normal expiration.

In this case, the assertion claims that TV is equal to ERV. This is incorrect because while both are volumes related to breathing, they are not equal. Therefore, the assertion is **false**.

### Step 2: Evaluate the Reason
The reason states: "Volume of air that will remain in the lungs after a normal expiration is ERV = RV."

- **Residual Volume (RV)** is the volume of air that remains in the lungs after a forced expiration, and it cannot be expelled.
- The statement claims that ERV is equal to RV, which is also incorrect. ERV is the volume that can be exhaled after a normal expiration, while RV is the volume that remains in the lungs after maximal expiration.

Thus, the reason provided is also **false**.

### Conclusion
Both the assertion and the reason are false. Therefore, the correct option is that both the assertion and the reason are false.