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 hashtable_Example
    {
        public static void main(String args[]) 
        {
            Hashtable object = new Hashtable();
            object.put("P", new Integer(12));
            object.put("Q", new Integer(21));
            object.put("R", new Integer(18));
            System.out.print(object.toString());
        }
    }

1. {R=18, Q=21}
2. {Q=21, P=12}
3. {R=18, P=12}
4. {R=18, Q=21, P=12}
5. {P=12, R=18}

Correct Option: D

object.toString returns String equivalent of the hashtable, which can also be obtained by simply writing System.out.print(object); as print system automatically converts the object tostring equivalent.