Final answer:
The init method is called d. at class instantiation in Python to initialize the attributes of an object.
Step-by-step explanation:
The init method, also known as the constructor method, is called at class instantiation when an object is created from a class in Python.
It is used to initialize the attributes of an object.
For example, if we have a class called Car with attributes like color and model, the init method would be called when we create a new Car object to set the initial values for these attributes.