Bronchial arteries supply the lung up to -: (A) Major bronchi, (B) Alveolar duct, (C) Tertiary bronchi, (D) Respiratory bronchioles
Answer is D. Ans. is 'd' i.e., Respiratory bronchioles o Bronchial arteries supply the lung till the beginning of respiratory bronchiole (conducting part) and then anastomose with pulmonary arteries.