What programming language originated within the Scandinavian school and is a pure object-oriented language?

The correct answer is Beta, which is known for being a pure object-oriented programming language that emerged from the Scandinavian school of programming. It was developed by Bent Bruun Kristensen, Ole-Johan Dahl, and Kristen Nygaard as part of the research at Aarhus University in Denmark. Beta is noteworthy for its strong emphasis on object-oriented principles, such as encapsulation and inheritance, and it offers advanced features like multiple inheritance and a unique type system.

In contrast, other languages listed have different origins and design philosophies. Java and C#, for instance, are multi-paradigm programming languages that incorporate object-oriented features but do not qualify as pure object-oriented languages since they also support procedural programming. Swift, while being a highly modern and versatile language developed by Apple, is influenced by various programming paradigms, including functional programming, and similarly does not fit the criteria of being a pure object-oriented language.