public abstract class A {
   public string PublicPrint() { 
      return Print(); 
   protected virtual string Print() {
        return "A"; 
 public class B : A { } 
 public class C : B { 
     protected override string Print() { 
         return "C"; 
What will be the result of the following code execution?
A ac = new C(); 
This question is about basic rule of polymorphism. Code is calling an overloaded method. This method must be marked as virtual in a base class and must have "override" keyword in its signature in derived class.

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