Question

\begin{table}[h] \centering \begin{tabular}{|c|l|c|l|} \hline \multicolumn{2}{|c|}{List I (Respiratory Volume)} & \multicolumn{2}{c|}{List II (Capacity in mL)}
\hline A & ERV (Expiratory Reserve Volume) & I & $2500 - 3000$ mL
B & RV (Residual Volume) & II & $500$ mL
C & IRV (Inspiratory Reserve Volume) & III & $1000 - 1100$ mL
D & TV (Tidal Volume) & IV & $1100 - 1200$ mL
\hline \end{tabular} \caption{Match List I with List II} \end{table} Choose the correct answer from the options given below :}

• A. A-I, B-II, C-III, D-IV
• B. A-III, B-IV, C-I, D-II
• C. A-III, B-I, C-IV, D-II
• D. A-I, B-III, C-II, D-IV

Hint:

Logic Tip: Rank them by size to avoid confusion! Smallest: TV ($500\text{ mL}$) Middle: ERV ($1000-1100\text{ mL}$) and RV ($1100-1200\text{ mL}$) Largest: IRV ($2500-3000\text{ mL}$) You can always breathe {in} much more than you can forcefully breathe {out}!

Answer 1

The Correct Option is B

Concept:
The physiological capacity of the human lungs is assessed by measuring different respiratory volumes using a spirometer. Memorizing the standard average volumes for a healthy human adult is crucial for clinical evaluation of pulmonary function.
Step 1:
Tidal Volume (TV) is the volume of air inspired or expired during normal, resting respiration. It is the smallest of the standard volumes, averaging about $500\text{ mL$}. Match: D $\rightarrow$ II
Step 2:
Inspiratory Reserve Volume (IRV) is the additional volume of air a person can inspire by a forcible inspiration over and above the normal tidal volume. Because we have a large capacity to take a deep breath, this is the largest of the basic reserve volumes, averaging $2500\text{ mL$ to $3000\text{ mL}$}. Match: C $\rightarrow$ I
Step 3:
Expiratory Reserve Volume (ERV) is the additional volume of air a person can expire by a forcible expiration after a normal tidal expiration. This is significantly less than the inspiratory reserve, averaging $1000\text{ mL$ to $1100\text{ mL}$}. Match: A $\rightarrow$ III
Step 4:
Residual Volume (RV) is the volume of air that always remains in the lungs even after the most forcible expiration possible. This prevents the alveoli from collapsing. It is slightly larger than the ERV, averaging $1100\text{ mL$ to $1200\text{ mL}$}. Match: B $\rightarrow$ IV
Step 5:
Combining all the verified matches yields the sequence A-III, B-IV, C-I, D-II. Looking at the provided choices, this corresponds perfectly to Option (2).