A balloon is been blown up by a healthy person with no known respiratory disorder. Select the option that correctly provides information about the proportion of gasses of air inside the balloon compared to the proportion of gasses of air outside the balloon.
`{:(No,"water vapour","oxygen","carbon dioxide"),(1,"More","More","Less"),(2,"Less","More","More"),(3,"More","Less","More"),(4,"less","Less","More"):}`

Options

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

Answer

To solve the question regarding the proportion of gases inside a balloon blown up by a healthy person compared to the gases outside the balloon, we need to analyze the composition of exhaled air versus atmospheric air.

### Step-by-Step Solution:

1. **Understand the Composition of Atmospheric Air:**
- Atmospheric air primarily consists of:
- Oxygen (O2): approximately 21%
- Carbon Dioxide (CO2): approximately 0.04%
- Water Vapour (H2O): approximately 0.05%
- This composition is relatively stable under normal conditions.

2. **Understand the Composition of Exhaled Air:**
- When a person exhales, the air composition changes due to the process of respiration:
- Oxygen (O2): decreases to about 16%
- Carbon Dioxide (CO2): increases significantly to about 4-5%
- Water Vapour (H2O): increases to about 5-6% due to moisture from the lungs.

3. **Compare the Two Compositions:**
- Inside the balloon (exhaled air):
- More Carbon Dioxide (4-5% compared to 0.04%)
- More Water Vapour (5-6% compared to 0.05%)
- Less Oxygen (16% compared to 21%)
- Outside the balloon (atmospheric air):
- Less Carbon Dioxide
- Less Water Vapour
- More Oxygen

4. **Select the Correct Option:**
- Based on the analysis:
- Water Vapour: More inside the balloon
- Carbon Dioxide: More inside the balloon
- Oxygen: Less inside the balloon
- The correct option that summarizes this information is:
- More Water Vapour, More Carbon Dioxide, Less Oxygen.

Thus, the answer is option 3: "More" water vapour, "Less" oxygen, and "More" carbon dioxide.