Consider the following code Px = new Q(); Qy = new Q0: Pz = new Q); x. f (1):((P) y). f (1); z.f(1); The output is (A) 121 (B) (D) 2 1 1 (C) 212 2 22

not clearly....

you got it or not

ans is D 222 this is polymorphism  Superclass object = new subclass(); object created for subclass referenced by a superclass  when anything invoked using this object (THIS IS ...