This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Most posterior structure seen in root of lung is 
Select and explain. 
A. Bronchus, B. Superior pulmonary vein, C. Inferior pulmonary vein, D. Pulmonary aery
A: Bronchus
Answer: A: Bronchus 
Explanation: Most posterior structure in the root of the lung is bronchus <img src=" /> B D CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME1 SIXTH EDITION Page no-237