Complete the following sentences by selecting the correct option.
(A) Inspiratory capacity `(IC) = overset((i))"_________" + IRV`
(B) `overset((ii))"________" = TV + IRV + ERV`
(C) Funcational residual capacity `(FRC) = ERV + overset((iii))"_________"`

Options

A. `{:("(i)",(ii),(iii)),("Vital capacity","Tidal Volume","Residual volume"):}`
B. `{:("(i)",(ii),(iii)),("Expiratory capacity","Residual volume","Inspiratory reserve volume"):}`
C. `{:("(i)",(ii),(iii)),("Tidal volume","Vital capacity","Residual volume"):}`
D. `{:("(i)",(ii),(iii)),("Tidal volume","Total lung capacity","Expiratory capacity"):}`

Answer

To solve the question, we need to complete the sentences by filling in the correct terms related to lung volumes and capacities. Let's break it down step by step:

### Step 1: Understand Inspiratory Capacity (IC)
- **Definition**: Inspiratory Capacity (IC) is the maximum amount of air that can be inhaled after a normal expiration.
- **Formula**: IC = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV)

**Fill in the blank (i)**: The first blank is filled with **Tidal Volume (TV)**.

### Step 2: Understand Vital Capacity (VC)
- **Definition**: Vital Capacity (VC) is the maximum amount of air that can be exhaled after a maximum inhalation. It includes the tidal volume, inspiratory reserve volume, and expiratory reserve volume.
- **Formula**: VC = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV)

**Fill in the blank (ii)**: The second blank is filled with **Vital Capacity (VC)**.

### Step 3: Understand Functional Residual Capacity (FRC)
- **Definition**: Functional Residual Capacity (FRC) is the volume of air remaining in the lungs after a normal expiration.
- **Formula**: FRC = Expiratory Reserve Volume (ERV) + Residual Volume (RV)

**Fill in the blank (iii)**: The third blank is filled with **Residual Volume (RV)**.

### Final Answers:
- (A) Inspiratory capacity (IC) = **Tidal Volume (TV)** + IRV
- (B) **Vital Capacity (VC)** = TV + IRV + ERV
- (C) Functional residual capacity (FRC) = ERV + **Residual Volume (RV)**

### Summary of Completed Sentences:
(A) Inspiratory capacity (IC) = **Tidal Volume (TV)** + IRV
(B) **Vital Capacity (VC)** = TV + IRV + ERV
(C) Functional residual capacity (FRC) = ERV + **Residual Volume (RV)**

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