Which of the following lymph nodes are known as Delphic nodes?

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.