In the context of the input sentence, determine the relationship between 'Eurogroup' and 'Jeroen Dijsselbloem'.
Options: platform, owned by, currency, chairperson

Eurogroup chief Jeroen Dijsselbloem said the "issue of credibility and trust was discussed" by ministers, who are wary of the Greek government's commitment to enacting the new reforms which closely resemble those rejected by voters in a surprise referendum.
chairperson