Which of the following statement is correct with respect to garbage collector?
1.Managing memory leaks.
2.Releasing memory on the stack.
3.Managing database collections.
4.Closing unclosed files.
5.Releasing memory taken by unreferenced objects.

Memory Leak:
A memory leak occurs when a program dynamically allocates memory that doesn't get properly de-allocated after its use.
Unreferenced objects:
The objects that are created during execution of some classes but currently not in use.
Garbage collector takes care of these two situations internally.