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`isinstance()` is a built-in Python function used to verify if an object is an instance of a specific class or a subclass thereof.

The `__eq__` special method is used to override the `==` operator for defining equality comparison between objects.

Class variables are variables that belong to the class and are shared by all objects created by the class.

`@classmethod` is the decorator used to define a class method.

Garbage collection is the process of automatically identifying and reclaiming memory (objects) that is no longer in use by a program, thereby preventing memory leaks and improving efficiency.

Q.

A. Please choose from the answers below.