Concept:A correct active-to-passive transformation must preserve the original tense and make the object of the active sentence the subject of the passive sentence.
Explanation:Look at pair (A)-(D): Active: "The captain awarded the winner a medal."
Passive: "The winner was awarded a medal by the captain."
This is correct because the indirect object "the winner" becomes the subject, and the past tense "awarded" changes to "was awarded".
Pair (C)-(F) is also correct: "The local press is reviewing the new film" becomes "The new film is being reviewed by the local press."
The present continuous tense is properly retained with "is being reviewed".
Pair (B)-(E) is incorrect because "Bring the file immediately" is an imperative sentence, and its correct passive form is "Let the file be brought immediately."
Among the given options, only option B contains the correct pair A-D.
All other option pairs do not follow the correct active-to-passive transformation.
Answer:Option B: A-D