The question tests order, not fame.
The first German Bundestag elected Adenauer in the Federal Republic’s founding year. His term therefore begins at the start of West German governmental history from 1949.
Ludwig Erhard directly succeeded Adenauer in 1963. Willy Brandt became Chancellor in 1969 and Gerhard Schröder in 1998. These four names are only a selection from the complete succession; Kurt Georg Kiesinger’s term, for example, fell between Erhard and Brandt.
The other three answers
The other three people took office later.
Ludwig Erhard.
Ludwig Erhard was Chancellor from 1963 to 1966. He directly succeeded Adenauer, making him the second rather than the first Federal Chancellor.
Willy Brandt.
Willy Brandt served from 1969 to 1974. His term began twenty years after Adenauer’s.
Gerhard Schröder.
Gerhard Schröder was Chancellor from 1998 to 2005. He belongs to a much later period in the Federal Republic’s history.
Federal Chancellor and Federal President are different offices.
Adenauer was the first Federal Chancellor; Theodor Heuss was the first Federal President. Both began in 1949, but they held different responsibilities. Their names are not interchangeable answers to questions about the first officeholder.
The Federal Chancellor is elected by the Bundestag. The test answer therefore does not mean Adenauer became Chancellor through a direct popular vote. The question also explicitly concerns the Federal Republic, not earlier German states.
Chancellors since 1949 · Federal Government ↗First Federal Chancellor: Adenauer, from 1949.
Link the name to the office and starting year. This helps prevent confusion with both later chancellors and the Federal President.
Three words for this question
- der Amtsbeginnstart of a term of office
- The point at which someone takes up an office.
- der Nachfolgersuccessor
- A person who takes over an office after someone else.
- die Reihenfolgeorder / sequence
- The chronological sequence of people or events.