Match the Items of Column I with items in Column II regarding exhalation.
Column I
Column II
A. Diaphragm 1. Increase
B. Air pressure 2. Becomes dome shaped
C. Intercostal muscles 3. Relax
D. Thoracic cavity 4. Decrease

A-1, B-2, C-3, D-4

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A-2, B-1, C-3, D-4

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A-2, B-1, C-4, D-3

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A-2, B-3, C-1, D-4

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Solution

The correct option is B A-2, B-1, C-3, D-4
During exhalation, diaphragm relaxes and moves upward becoming dome shaped. Intercostal muscles present between the ribs relaxes and space in the thoracic cavity decreases. Due to reduced space, air pressure in the thoracic cavity increases and air is forced out.
Thus, the correct answer is option B.

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Match the Items of Column I with items in Column II regarding exhalation.Column I Column IIA. Diaphragm1. IncreaseB. Air pressure2. Becomes dome shapedC. Intercostal muscles3. RelaxD. Thoracic cavity4. Decrease

Match the Items of Column I with items in Column II regarding exhalation.
Column I
Column II
A. Diaphragm 1. Increase
B. Air pressure 2. Becomes dome shaped
C. Intercostal muscles 3. Relax
D. Thoracic cavity 4. Decrease