Take context from the input text and decide on the accurate relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' from the options provided.
Options: founded by, distribution format, location of formation, chairperson

Eurogroup president Jeroen Dijsselbloem - who represents all 19 finance ministers - questioned whether Mr Tsipras could implement measures which he had attacked as "blackmail" and “humiliation” only seven days ago.
chairperson