RV + VC =

Options

A. EC
B. TLC
C. IC
D. RV

Answer

To solve the question RV + VC = ?, we need to understand the terms involved: RV (Residual Volume) and VC (Vital Capacity).

### Step-by-Step Solution:

1. **Identify the Terms:**
- **RV (Residual Volume):** This is the volume of air that remains in the lungs after a maximum exhalation. It cannot be expelled from the lungs.
- **VC (Vital Capacity):** This is the maximum volume of air that can be expelled from the lungs after a maximum inhalation. It represents the total amount of air that can be moved in and out of the lungs during breathing.

2. **Understanding the Relationship:**
- The total lung capacity (TLC) is defined as the total volume of air that the lungs can hold. It is the sum of the residual volume (RV) and the vital capacity (VC).
- Mathematically, this relationship can be expressed as:
\[ TLC = RV + VC \]

3. **Conclusion:**
- Therefore, when we add the residual volume (RV) and the vital capacity (VC), we get the total lung capacity (TLC).
- Thus, the answer to the question RV + VC is:
\[ RV + VC = TLC \]

### Final Answer:
RV + VC = TLC