The sentence is a yes/no question, so in indirect speech we use "if". Present tense changes to past tense: is → was your → his me → her
Change the narration: The old lady said to her son, “Is it not your duty to help me in my old age”?
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Question context
This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.