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
Thoracic duct opens into 
Select and explain. 
A. Subclan vein, B. Internal jugular vein, C. Right brachiocephalic vein, D. Left brachiocephalic vein
D: Left brachiocephalic vein
Answer: D: Left brachiocephalic vein 
Explanation: In the neck, it arches laterally at the level of the transverse process of seventh cervical veebra. Finally it descends in front of the first pa of the left subclan aery and ends by opening into the angle of junction between the left subclan and left internal jugular veins ( both these left subclan and left internal jugular vein drains into left brachiocephalic vein ) <img src=" /> Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 1, pg. no. 302