Consider the code below. Which of the following is an example of an instance attribute?

An instance attribute is a variable that is bound to the instance of a class and is typically defined within the class's methods, especially the constructor (often called __init__ in Python). Instance attributes hold data that is specific to each object created from the class.

In the options provided, last_name is an example of an instance attribute. When you create a class, you might define a constructor where you establish properties like last_name for each instance of that class, allowing each object (or instance) to maintain its own state. For example, if you have a class called Student, you could define last_name within the constructor so that every student instance has its own last name.

In contrast, print_name could be interpreted as a method, which operates on instance attributes but is itself not an attribute. The student1 option refers to a specific instance of the Student class, and Student refers to the class itself, not its individual attributes. Therefore, last_name is the only option that correctly represents an instance attribute that would exist for each object of a class.