Correct Answer: The boy said to his mother, “Please give me a mango.”

Solution : The correct choice is the fourth option. :

The indirect form (also known as reported speech) involves reporting or paraphrasing what someone else has said.

The steps of conversion are as follows:

• We would change the sentence in the direct speech from imperative to assertive.
• The reporting verb "requested" is changed to "said" in the direct speech.
• The third-person pronoun "him" is changed to the first-person pronoun "me".
• "To + infinitive" will be replaced by the base form of the verb "give".
• The words of the speaker are enclosed in the inverted commas.

Therefore, the direct form would be: The boy said to his mother, "Please give me a mango."