Facts related to public relations are given below<br>1. Internal relations<br>2. Customer relations<br>3. Concept of public relations<br>4. Internal coordination<br>Which of the above given is/are types of public relations?

A. public class Circle implements Shape { private int radius; }B. public abstract class Circle extends Shape { private int radius; }C. public class Circle extends Shape { private int radius; public void draw(); }D. public abstract class Circle implements Shape { private int radius; public void draw(); }E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } }F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }