This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Thoracic duct stas at : 
Select and explain. 
A. Continuation of cystema chyli, B. Right lymphatic duct, C. Junction of azygous vein and IVC, D. None of the above
A: Continuation of cystema chyli
Answer: A: Continuation of cystema chyli 
Explanation: A i.e. Continuation of cystemachyle