In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech. He said to the principal, "I have made a mistake."

• He told the principal that I have had made a mistake.
• He told the principal that he had made a mistake.
• He tells the principal that he has made a mistake.
• He told the principal this that he has made a mistake.