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Answer: 1. IRV + ERV + TV

Key idea: Vital capacity is the maximum air that can be breathed out after a maximum inspiration.

\(VC = ERV + TV + IRV\). RV is not included, because residual volume stays in the lungs. Option 3 would be total lung capacity. Option 1.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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