listed below are four respiratory capacities (A-D) and four jumbled respiratory volumes of a normal human adult
`{:("Respiratory capacities" , - " " "Respiratory volumes"),("Residual volume", -" " "2500 mL"),("Vital capacit",- " ""3500 mL"),("Inspiratory reserve volume",-" "1200 mL),("Inspiratory capacity", -" " 4500mL):}`
Which one of the following is the correct matching of two capacities and volumes

Options

A. (A) 4500 mL, (B) 3500 mL
B. (B) 2500 mL, (C )4500 mL
C. (C ) 1200 mL, (D) 2500 mL
D. (D) 3500 mL, (A) 1200 mL

Answer

To solve the problem of matching the respiratory capacities with their corresponding volumes, we will analyze each capacity and its definition, then find the correct volume associated with it.

### Step-by-Step Solution:

1. **Identify the Respiratory Capacities and Definitions:**
- **Residual Volume (RV):** The amount of air that remains in the lungs after a forcible expiration.
- **Vital Capacity (VC):** The maximum amount of air that can be exhaled after a maximum inhalation.
- **Inspiratory Reserve Volume (IRV):** The maximum volume of air that can be inhaled after a normal inhalation.
- **Inspiratory Capacity (IC):** The maximum amount of air that can be inhaled after a normal expiration.

2. **List the Volumes Provided:**
- Residual Volume: 2500 mL
- Vital Capacity: 3500 mL
- Inspiratory Reserve Volume: 1200 mL
- Inspiratory Capacity: 4500 mL

3. **Match Each Capacity with the Correct Volume:**
- **Residual Volume:** The expected value is approximately 1100 mL to 1200 mL. The closest match here is **1200 mL**.
- **Vital Capacity:** The expected value is approximately 4600 mL. The closest match provided is **4500 mL**.
- **Inspiratory Reserve Volume:** The expected value is approximately 3000 mL, which is not provided in the options.
- **Inspiratory Capacity:** The expected value is approximately 3500 mL, which is not provided in the options.

4. **Determine the Correct Matches:**
- **Residual Volume:** 1200 mL (correct match)
- **Vital Capacity:** 4500 mL (closest match)
- **Inspiratory Reserve Volume:** No match available
- **Inspiratory Capacity:** No match available

5. **Conclusion:**
The best matching pairs based on the definitions and provided volumes are:
- Residual Volume: 1200 mL
- Vital Capacity: 4500 mL

Thus, the correct matching of the respiratory capacities and volumes is:
- **Residual Volume (RV)**: 1200 mL
- **Vital Capacity (VC)**: 4500 mL

### Final Answer:
The correct matching of capacities and volumes is:
- Residual Volume: 1200 mL
- Vital Capacity: 4500 mL