Consider the following class definition in a hypothetical

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Consider the following class definition in a hypothetical object oriented language that supports inheritance and uses dynamic binding. The language should not be assuemed to be either Java or C++, though the syntax is similar.
Class P { Class Q subclass of P {
void f (int i) { void f (int i) {
print (i); print (2*i);

}
}
Now, consider the following program fragment”
Px = new Q()
Qy = new Q();
Pz = new Q();
X.f(1); ((P)y). f(1); z.f(1);
Here, ((P)y) denotes a type cast of y to P. The output produced by executing the above program fragment will be

1. 1 2 1
2. 2 1 1
3. 2 1 2
4. 2 2 2

Correct Option: D

1. Px = newQ();
2. Qy = newQ();
3. Pz = newQ();
4. x : f (1); print 2 # i = 2
5. ((P) y) : f (1);
6. z : f (1) print 2 # i = 2
but line 5. will print 2 because typecast to parent class can't prevent over ridding. So function f(1) of class Q will be called not f (1) of class P.
Hence (d) is correct option.

Class P {	Class Q subclass of P {
void f (int i) {	void f (int i) {
print (i);	print (2*i);