What is the relationship between eurozone and euro in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

"However, if it increasingly looks like the economic hit to the rest of the eurozone from a Greek exit was being contained (by the various firewalls that have been put in place in recent years, and the fact that Greece only accounts for some 2pc of eurozone GDP), sterling’s gains against the euro would likely be limited."

Answer: currency