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Question 1: class X implements Runnable
{
public static void main(String args[])
{
/* Missing code? */
}
public void run() {}
}
Which of the following line of code is suitable to start a thread ?

1. Thread t = new Thread(X);
2. Thread t = new Thread(X); t.start();
3. X run = new X(); Thread t = new Thread(run); t.start();
4. Thread t = new Thread(); x.run();