Question:easy

Vital capacity (VC) is:

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Vital Capacity = Inspiratory Reserve Volume + Tidal Volume + Expiratory Reserve Volume.
Updated On: Jun 10, 2026
  • 4000-4600 ml
  • 2500-3000 ml
  • 2100-2300 ml
  • 3000-3500 ml
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The Correct Option is A

Solution and Explanation

Step 1: Understand what is being asked.
The question wants the value of vital capacity, also written as VC. We must pick the correct volume range from the four choices.

Step 2: Know what vital capacity means.
Vital capacity is the largest amount of air a person can breathe out after taking the deepest possible breath in. So it is the biggest useful breath the lungs can handle.

Step 3: Break VC into its parts.
Vital capacity is made of three smaller volumes added together. $ VC = TV + IRV + ERV $, where $ TV $ is tidal volume, $ IRV $ is inspiratory reserve volume, and $ ERV $ is expiratory reserve volume.

Step 4: Put in the standard textbook numbers.
Tidal volume is about $ 500 $ ml, inspiratory reserve volume is about $ 2500 $ to $ 3000 $ ml, and expiratory reserve volume is about $ 1000 $ to $ 1100 $ ml.

Step 5: Add the parts to get the range.
Adding the lowest values gives about $ 500 + 2500 + 1000 = 4000 $ ml, and adding the highest values gives about $ 500 + 3000 + 1100 = 4600 $ ml.

Step 6: Match with the options.
So the healthy adult range is roughly $ 4000 $ to $ 4600 $ ml. This matches the first choice. The other ranges are too small to be a full vital capacity.
\[ \boxed{4000\text{-}4600 \text{ ml}} \]
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