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

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