You created two subclasses, namely, SingletonA and SingletonB, of the original Singleton class and then created a subclass of SingletonA, called SingletonA$1.$

You created instances $a,a1,$ and $b$ for subclasses SingletonA, SingletonA$1,$ and SingletonB respectively and attached a dynamic property, $x,$ with a value $100$ to $a.$

What will be the result of the following code?