The volume in lungs at the time of full relaxation of lungs is: (A) FRC, (B) Tidal volume, (C) Inspiratory reserve volume, (D) Expiratory reserve volume
Answer is A. Functional residual capacity: Amount of air remaining in the lungs after a normal tidal expiration (RV + ERV). Around 2400 mlRef: Ganong review of medical physiology 23rd edition Page no: 593