All of the following lie between the 1st rib and the apex of the lung, except: (A) Thoracic duct, (B) Superior intercostal aery, (C) First posterior intercostal vein, (D) Sympathetic trunk
Answer is A. Thoracic duct is in the posterior mediastinum . <img src=" /> Ref - BDC 6th editon vol 1 Pg275