Four points L, M, N, and P are chosen on the circumference of a circle as shown in the figure given below. If 4 arc-length(LM) = 4 arc-length(NP) = 2 arc-length(MN) = πR , where ‘R’ is the radius of the circle, then what is the measure of the ∠MON ?

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 */ } }