6. What is wrong in the following code? public class Test ( a. b. c. d. public static void main(String[] args) { methodl (); } private static void methodl () { Circle c; System.out.println ("What is radius " + c.getRadius ()); } } methodl should be declared before main, since it is used in main. methodl is a private method and cannot be invoked in the main method. The program has a compilation error in the printin statement where c has not been initialized. The program compiles fine, but it has a runtime error because variable c has not been initialized.