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.
Take context from the input text and decide on the accurate relationship between 'Eurogroup' and 'Jean-Claude Juncker' from the options provided.
Options: chairperson, product/material produced, employer, chief executive officer