What is the output of the below Java program? public class A{ int variable 1; 3 public class Testing { public static void main (String[] args) { A obj1 = new A0; obj 1.variable1= 100; A obj2; obj2 = obj1; obj2.variable1 = 300; System.out.println("Result = " + obj1.variable 1); } 3 Result=0 O Result= 100 Result= 300 error