Correct Answer: The prosecutor asked the watchman if he was present at the crime scene.

Solution : The correct choice is the fourth option .

Narration Conversion:

• The verb said is changed to asked because the reported clause is a question.
• The question is changed into the statement, and the connector if is used to introduce the reported clause in a "yes" or "no" question.
• The first-person pronoun I is changed to the third-person pronoun he in the indirect form.

Therefore, the sentence in the indirect form is: The prosecutor asked the watchman if he was present at the crime scene.