Which minister does Saarland not have?

EDITORIAL LEARNING AID

Why is this answer correct?

Foreign policy is a matter for the federal government (Article 73(1) of the Basic Law), which is why a foreign ministry exists only at federal level and none in Saarbrücken. Justice, finance and the interior are ministries that Saarland itself has.

A foreign ministry only at federal level, not in Saarland.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.