What is the normal tidal volume of the lungs?

Correct option is B

Ans. (b) 500 ml Sol. Tidal volume is the amount of air inhaled or exhaled during normal breathing. In a healthy adult, this is approximately 500 ml.
Explanation of each option:
· (a) 250 ml – Too low for a normal adult; seen in shallow breathing.
· (b) 500 ml – Correct. This is the standard tidal volume.
· (c) 750 ml – Higher than normal tidal volume; may occur during deep breathing.
· (d) 1000 ml – Represents inspiratory reserve, not normal tidal volume.