A pure virtual function is a member function
a. Whose declaration ends with = 0.
b. That is used in a derived class only.
c. That is used in a base class
d. Takes no arguments
e. Member form that is used to force all derived classes to implement that member function or be a pure virtual function member of the derived class.
Parts a) c) and e).
Explanation: The description in the several correct parts about does it. The part missing is: A class that has a pure virtual member function is called an abstract base class. No objects can be defined of abstract base class type since it is an incomplete definition.
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