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abstract class A {
abstract void a1();
void a2() {
}
}
class B extends A {
void a1() {
}
void a2() {
}
}
class C extends B {
void c1() {
}
}
And:
A x = new B();
C y = new C();
A z = new C();
What are four valid examples of polymorphic method calls? (Choose four.)

A. x.a2();
B. z.a2();
C. z.c1();
D. z.a1();
E. y.c1();
F. x.a1();

A.	ABCD	B.	ABDC
C.	ABDF	D.	ABDE
E.	BCDE

Answer and Explanation

Answer:ABDF

Explanation:
just normal flow of execution

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