Option 1 -> Incorrectly matches "Call off" with "Mention or introduce a topic" instead of "Cancel something planned".
Option 2 -> Incorrectly matches "Call off" with "Reject an offer" and "Turn down" with "Cancel something planned".
Option 3 -> Incorrectly matches "Call off" with "Mention or introduce a topic" and "Bring up" with "Reject an offer".
Option 4 -> Correctly matches all phrasal verbs: "Call off" = Cancel; "Bring up" = Mention/introduce topic; "Look into" = Investigate; "Turn down" = Reject.
Hence, Option 4: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) -> "Call off" means to cancel plans (e.g., "call off a meeting"), "Bring up" means to introduce a topic in conversation, "Look into" means to investigate carefully, and "Turn down" means to reject an offer or request -> correct