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
Which of the following lymph nodes are known as Delphic nodes? 
Select and explain. 
A. Pretracheal, B. Paratracheal, C. Supraclavicular, D. Posterior triangle
A: Pretracheal
Answer: A: Pretracheal 
Explanation: There is extensive lymphatic network seen in thyroid. Although some lymph channels pass directly to the deep cervical nodes, the subcapsular plexus drains principally to the central compament juxta thyroid - 'Delphian' or pretracheal - and paratracheal nodes and nodes on the superior and inferior thyroid veins, and from there to the deep cervical and mediastinal groups of nodes.