Choose the correct transformation of the given sentence in Indirect S…

The correct answer is Option (2) → The teacher asked the boy why he didn't bring his books.

Direct	Indirect
The teacher said to the boy, "Why don't you bring your books?"	The teacher asked the boy why he didn't bring his books.

Wh-question in indirect speech:

• Reporting verb: "said to" becomes asked; the question word why joins the two parts (no "that").
• Word order: the question becomes a statement, subject before verb ("why he didn't bring"), and the question mark is dropped.
• Tense change: the reporting verb is in the past, so the simple present "don't" becomes the simple past didn't.
• Other standard changes: do/does → did, is/am → was, are → were, will → would, can → could, has/have → had.
• Pronoun changes: "you" → he, "your" → his.
  Example: She said to me, "Why do you come late?" → She asked me why I came late.

Why the Other Options are Incorrect?

Option 1: The teacher said to the boy that why don't you bring your books? — Incorrect.

• "said to" is kept and "that why" joins the clause; a question is reported with "asked" and the question word only.
• The question order, the tense, the pronouns and the question mark are all left unchanged.

Option 3: The teacher asked the boy, why didn't he bring your books?" — Incorrect.

• It keeps the question order ("why didn't he bring") and the question mark.
• "your" is not changed to "his".

Option 4: The teacher asked the boy, why didn't he bring his books. — Incorrect. The pronouns are right, but it keeps the question order "why didn't he bring" instead of the statement order "why he didn't bring".