What is the output of this program?

(a) 0
(b) 36
(c) Runtime Error
(d) Compilation Error

import java.util.*; public class genericstack { Stack stk = new Stack (); public void push (E obj) { stk.push (obj); } public E pop() { stk.pop(); } E obj } return obj; } class Output { public static void main(String args[]) { genericstack gs = new genericstack (); gs.push (36); System.out.println (gs. pop ());