Which statements among following are correct?
(a) We can derive a class from a base class even if source code of base class not available
(b) Multiple inheritance is different from multiple levels of inheritance
(c) It is legal to make objects of one class as members of another class
(d) All of the mentioned
The question was posed to me during an online exam.
Question is taken from Fundamentals of Inheritance in chapter Object Oriented Concepts of C#