Arrange the following in the order of increasing volume
1) Tidal volume
2) Residual volume
3) Expiratory reserve volume
4) Vital capacity

Options

A. A=3, B=4 C=2 D=1
B. A=4 B=3 C=2 D=1
C. A=3 B=4 C=1 D=2
D. A=1 B=3 C=2 D=4

Answer

To arrange the given lung volumes in order of increasing volume, we need to first understand what each volume represents and their approximate values:

1. **Tidal Volume (TV)**: This is the volume of air displaced during normal inhalation and exhalation. It is approximately **500 ml** (or 0.5 liters).

2. **Residual Volume (RV)**: This is the volume of air that remains in the lungs after a forced exhalation. It is approximately **1.1 liters**.

3. **Expiratory Reserve Volume (ERV)**: This is the additional amount of air that can be forcibly exhaled after a normal exhalation. It is approximately **0.7 liters**.

4. **Vital Capacity (VC)**: This is the maximum amount of air that can be exhaled after taking the deepest breath possible. It is approximately **4.6 liters**.

Now, let's list the volumes in order from smallest to largest:

- **Tidal Volume (TV)**: 0.5 liters
- **Expiratory Reserve Volume (ERV)**: 0.7 liters
- **Residual Volume (RV)**: 1.1 liters
- **Vital Capacity (VC)**: 4.6 liters

Thus, the order of increasing volume is:

**Tidal Volume (TV) < Expiratory Reserve Volume (ERV) < Residual Volume (RV) < Vital Capacity (VC)**

### Final Arrangement:
1. Tidal Volume (500 ml)
2. Expiratory Reserve Volume (0.7 liters)
3. Residual Volume (1.1 liters)
4. Vital Capacity (4.6 liters)

### Answer:
**Tidal Volume < Expiratory Reserve Volume < Residual Volume < Vital Capacity**

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