Once you attempt the question then PrepInsta explanation will be displayed.
Explanation: This question assesses the understanding of converting Direct speech to Indirect speech. The correct answer is option ‘He asked if they had watched the movie’ as it reports the speaker's words using a reporting verb (“He asked") and changes the verb tense ("watched" instead of "watch").
Explanations for incorrect answers
He said if the movie was watched by us- The sentence given to us was in interrogative form where we will add ‘ask’ instead of the question mark. In this sentence ‘said’ is written. Hence, the sentence is not in indirect speech.
He told us if we have watched the movie- This sentence has ‘told’ written in it but the original sentence was a question which means the sentence is wrongly framed here. Also, the sentence is in past tense and it should use ‘had’ instead of ‘have’.
He asked the people whether they have seen the movie- This sentence is incorrect because the sentence consists of a word ‘seen’ whereas the original sentence had a word ‘watch’ in this. When you use the word 'see', it refers to an action where you just notice or catch sight of something. The verb 'watch', on the other hand, means that you pay attention to something that you see or spend time observing. So, for the movie the word ‘watch’ is used.