Select the option that expresses the given sentence in indirect speech.

Raj said to his friend, “Please help me in this task.”

Raj requested his friend to help him in that task.

The correct option is: Raj requested his friend to help him in that task.

The other options are incorrect:

• "Raj ordered his friend to help him in this task." is incorrect because the word "ordered" implies a tone of authority or demand, which is not present in the original sentence.
• "Raj threatened his friend to help him in this task." is incorrect because the word "threatened" implies a negative consequence, which is not present in the original sentence.
• "Raj said to his friend please help me in this task." is incorrect because it is a direct copy of the original sentence, without making the necessary changes for indirect speech.