A county authority’s address can contain a different town name.
Börde names the county; Haldensleben names its county town and main administrative seat. Someone reading an authority’s address may therefore see both names together. They describe different levels and do not contradict one another.
The county stretches between Niedersachsen to the west and the Magdeburg area and Elbe to the east. This helps locate it within Sachsen-Anhalt. Bordering Niedersachsen does not make it a county of that state.

The other three answers
The other names are real counties, but belong elsewhere.
Ammerland
Ammerland is in Niedersachsen. Börde borders that federal state but belongs to Sachsen-Anhalt.
Altötting
Altötting is a county in Bavaria. It therefore does not match the required federal state.
Uckermark
Uckermark is in Brandenburg. A county in a neighbouring state is not automatically a county of Sachsen-Anhalt.
The question asks for neither a town nor a statistic.
Magdeburg is the state capital and an independent city. Haldensleben is Börde’s county town. Both town names help with orientation, but neither is the county answer required here.
Current population figures or the number of individual municipalities are unnecessary for this classification. The important point is which federal state the county belongs to.
Towns and municipalities · Börde county ↗Börde → Sachsen-Anhalt; county town → Haldensleben.
Remember the county name and town name separately.
Three words for this question
- der Landkreiscounty
- A local territorial unit encompassing several municipalities.
- die Kreisstadtcounty town
- The town where the county administration is based.
- kreisfreiindependent of a county
- A city does not belong to a county.
