12.
Which of the following best describes inheritance?

13.
Which of the following statements is wrong about inheritance?

15.
What does built-in function help do in context of classes?

16.
Which of the following statements isn't true?

17.
What is polymorphism in object-oriented programming?

18.
What is the difference between a class and an object in object-oriented programming?

20.
What is the biggest reason for the use of polymorphism?