Which keywords are used to implement polymorphism in C#?

Abstract methods must be marked with the "abstract" keyword and have no implementation.

Can you directly create an instance of an abstract class in C#?

A derived class can access private members of its base class.

A class in C# can inherit from multiple abstract classes.

In C#, a class can inherit from:

Which access modifier allows a derived class to access the members (fields and methods) of its base class?

Which statements are valid for a filed that marked as readonly in C#?

Which access modifier is required for static members of a class in C#?