Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

Options

A. there is a negative pressure in the lungs
B. there is a negative intrapleural pressure pulling at the lung walls
C. there is a positive intrapleural pressure
D. pressure in the lungs is higher than the atmospheric pressure

Answer

B

Explanation

Lungs do not collapse between breathes some air always remains in the lungs which can never be expelled because there is negative intrapleural pressure pulling at the lung well.