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What will be the output of the following program?

import java.util.*;
public class UsingSet {
    public static void main(String args[]) {
        Set set = new HashSet();
        set.add("Rama");
        set.add("Lakshman");
        set.add("Bharath");
        set.add("Rama");
        set.add("Rama");
        set.remove(Collections.singleton("Rama"));
        System.out.println(set);
    }
}


[Rama, Lakshman, Bharath, Rama, Rama]
[Rama, Lakshman, Bharath, Rama]
[Bharath, Rama, Lakshman]
Compilation Error or Runtime Error

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Topic: Java Singleton

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