The correct preposition after “interfere” when talking about someone’s matters is “in”. Using “in” indicates involvement or meddling in something that belongs to someone else.
Please do not interfere __________ my personal affairs.
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Question context
This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.