What keyword is used to define a class in Python?

• A. define
• B. class
• C. object
• D. function

Answer: (B)

In Python, the keyword used to define a class is "class." This keyword signals to the interpreter that you are creating a new class, which is a blueprint for creating objects. A class encapsulates data for the object and methods which operate on that data. By using "class," you can create user-defined data types that can include attributes (variables) and methods (functions associated with the class).

The use of this keyword is fundamental to object-oriented programming in Python, allowing you to implement features such as inheritance and polymorphism. Understanding how to define a class properly using this keyword is crucial for structuring code in a modular and reusable manner.

Other suggested keywords do not serve this purpose in Python. For instance, "define" is not a keyword in Python, and neither "object" nor "function" are used to create classes; "object" refers to instances of classes, while "function" relates specifically to defining reusable blocks of code within or outside of classes.