What is the head of government in Bavaria called?

EDITORIAL LEARNING AID

Why is this answer correct?

The head of government of Bavaria is the Minister-President; he or she is elected by the Landtag. A mayor heads a city or municipality, and the titles First Minister and Prime Minister are not used in Germany.

In Bavaria too: a Minister-President, elected by the Landtag.

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