Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++

The VPTR, or virtual pointer, points to the VTABLE, which contains the addresses of the virtual functions in a class. This allows for runtime polymorphism, where the appropriate version of a virtual function is called based on the type of object it is pointing to. The other options are incorrect because

-B: The VPTR does not point to the derived class, as this would defeat the purpose of dynamic binding.

-C: The VPTR does not point to the base class, as this would not allow for the derived class's specific virtual function implementation to be called.

-D: The VPTR does not point to the virtual functions directly, as this would not allow for dynamic binding and would also take up unnecessary memory.