Which Hungarian castle is a UNESCO World Heritage Site?

Which Hungarian castle is a UNESCO World Heritage Site?

A Füzér Castle
B Buda Castle
C Vajdahunyad Castle

Buda Castle was built in 1265 but does not look medieval. The Baroque palace that takes up most of the site was added to the complex in the 18th century. This UNESCO World Heritage Site overlooks the Danube River, the second-longest river in Europe.

The correct answer is Buda Castle.