Q. What is the output of the following program code?
abstract class C1{
public C1(){
System.out.print(1);
}
}
class C2 extends C1{
public C2(){
System.out.print(2);
}
}
class C3 extends C2{
public C3(){
System.out.println(3);
}
}
public class Test{
public static void main(String[] a){
new C3();
}
}

• (A) 12
• (B) 23
• (C) 123
• (D) 321