a

You created two subclasses, namely, SingletonA and SingletonB, of the original Singleton class and then created a subclass of SingletonA, called SingletonAl. You created instances a, al, and b for subclasses SingletonA, SingletonAl, and SingletonB respectively and attached a dynamic property, x, with a value 100 to a. What will be the result of the following code? b.x Traceback (most recent call last): A O File "", line 1, in WN AttributeError: 'SingletonA' object has no attribute 'x' Traceback (most recent call last) : B O N File "", line 1, in AttributeError: 'SingletonAl' object has no attribute 'x' Traceback (most recent call last) : N C O File "", line 1, in AttributeError: 'SingletonB' object has no attribute 'x' D O 100