Q. class A{
A(String s){}

A(){}
}

class B extends A{
B(){}
B(String s){
super(s);
}
void test(){
// insert code here
}
}

Which of the below code can be insert at line 7 to make clean compilation ?

• (A) A a = new B();
• (B) A a = new B(5);
• (C) A a = new A(String s);
• (D) A a = new A(String s); D. All of the above