What is the output of this program?import java.util.*;

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What is the output of this program?

import java.util.*;
    public class Map_Exmple 
    {
        public static void main(String args[]) 
        {
            TreeMap object = new TreeMap();
            object.put("I", new Integer(9));
            object.put("L", new Integer(12));
            object.put("U", new Integer(21));
            System.out.println(object.entrySet());
        }
    }

1. 9, 12, 21
2. I, L, U
3. [9, 12, 21]
4. [I=9, L=12, U=21]
5. None of these

Correct Option: D

object.entrySet() method is used to obtain a set that contains the entries in the map. This method provides set view of the invoking map.