Concept:In indirect speech for questions with a question word (like “how”), the question word itself acts as the conjunction. Also, present tense changes to past tense, and pronouns shift according to the reporting verb.
Explanation:The given sentence is a direct interrogative sentence with the question word “how”.
When converting to indirect speech, the question word “how” remains and connects the clauses — no extra conjunction like “that” is added.
The reporting verb “asked” stays the same because it is already a question.
The pronoun “you” (the person being addressed) changes to “she” (referring to Nakul’s listener).
The verb “do you know” becomes “she knew” (simple past) because the reporting verb is in past tense.
The clause “Rahul has told this to him” contains present perfect “has told”. In indirect speech, present perfect changes to past perfect “had told”.
Also, “this” becomes “that” in indirect speech.
So the complete indirect sentence is: Nakul asked her how she knew that Rahul had told that to him.
This matches option A. Options B, C, and D incorrectly keep “that” after “asked”, use wrong tenses, or fail to change “has”.
Answer:Option A: Nakul asked her how she knew that Rahul had told that to him.