With the ramifications still unclear and some analysts putting the chances of a "Grexit" at "very high", European Commission head Jean-Claude Juncker was to hold a teleconference on Monday morning with European Central Bank chief Mario Draghi, Tusk and Eurogroup head Jeroen Dijsselbloem.
In the context of the input sentence, determine the relationship between 'Eurogroup' and 'Jean-Claude Juncker'.
Options: employer, chairperson, chief executive officer, product/material produced