Which of the following is not a programming language?

Basic
Java
Turing
C#

The correct answer is C. Turing.

Turing is a machine, not a programming language. It is a theoretical model of computation that can be used to simulate any computer algorithm. It was developed by Alan Turing in the 1930s, and it is considered to be one of the most important concepts in computer science.

Basic is a high-level programming language that was developed in the 1960s. It is a simple and easy-to-learn language that is often used for teaching programming.

Java is a general-purpose programming language that was developed in the 1990s. It is a popular language for developing web applications and mobile applications.

C# is a general-purpose programming language that was developed by Microsoft in the 2000s. It is a popular language for developing Windows applications and web applications.