How many objects eligible for garbage collection?

Question

After the following code snippet is run, how many objects are not eligible for garbage
collection?
Assume that before the snippet was run, there were no objects created.
Dog A = new Dog();
Cat B = new Cat();
Dog C = new Dog();
Cat D = new Cat();
Dog E = new Dog();
Cat F = new Cat();
A = C;
C = E;

Answer 1

5