<suite name="Suite" parallel="none">
     <test name="Test" preserve-order="false">
         <parameter name="A" value="1"/>
         <parameter name="B" value="2"/>
         <parameter name="C" value="3"/>
         <parameter name="D" value="{4,5}"/>
         <classes>
             <class name="TestNGXMLData"/>
         </classes>
     </test>
 </suite>

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.thoughtworks.selenium.Selenium;
import static org.testng.Assert.assertTrue;
import org.testng.annotations.*;
import com.thoughtworks.selenium.*;

public class TestNGXMLData {

    @Test
    @Parameters(value = { "A", "B", "C", "D" })
    public void xmlDataTest(String A, String B, String C, ArrayList<String> ls) {

        System.out.println("Passing Three parameter to Test " + A + " and " + B + " and " + C);

        Iterator it = ls.iterator();
        while (it.hasNext()) {
            String value = (String) it.next();
        }
    }
}