What Will Be The Output Of The Following Java Codep Pre #845

 class A { String s = "NVAEducation"; } class B extends A { char ch = 'n'; } class C extends B { int a = 3; public void display() { System.out.println(s.indexOf(ch,a)); } } public class IndexOf { public static void main(String[] args) { C c = new C(); c.display(); } }