What will be the output of this code?

What will be the output of this code?

class Base {
  public virtual string Greet() => "Hello from Base";
}
class Derived : Base {
  public override string Greet() => "Hello from Derived";
}
class Program {
  static void Main() {
    Base obj = new Derived();
    System.Console.WriteLine(obj.Greet());
  }
}