This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax- wall and Bronchopulmonary segment, 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: Thoracic duct is continuation of cysterna chyli. It passes through aoic hiatus beginning at lower border of T12 . At T5 it crosses to left side andopens into the left venous (jugulo-subclan) angle - junction of the left internal jugular and subclan vein, at the beginning of left brachio-cephalic vein.