Correct Answer: Arunachal Pradesh
Subject: 2025
Explanation: <b>Key Fact</b><br>Among the listed states, Arunachal Pradesh has the lowest population density in Census 2011.<br><br><b>Additional Info</b><br>Topic: Population. The correct option is <b>A</b> — Arunachal Pradesh.<br><br><b>Why the other options are wrong</b><br><b>Option B</b>: Sikkim — not the option marked correct for this question.<br><b>Option C</b>: Manipur — not the option marked correct for this question.<br><b>Option D</b>: Mizoram — not the option marked correct for this question.<br><br><b>Exam Trick</b><br>Identify the exact concept tested, then eliminate options that contradict the definition, formula, chronology or fact in the question.<br><br><b>Final Answer</b><br>Option A — Arunachal Pradesh.