Correct Answer: a-iv, b-iii, c-ii, d-i
Subject: 2025
Explanation: <b>Key Fact</b><br>Auxin → root formation; gibberellin → internode growth; cytokinin → suppresses growth; ethylene → fruit ripening.<br><br><b>Additional Info</b><br>Topic: Plant Hormones. The correct option is <b>C</b> — a-iv, b-iii, c-ii, d-i.<br><br><b>Why the other options are wrong</b><br><b>Option A</b>: a-i, b-ii, c-iii, d-iv — not the option marked correct for this question.<br><b>Option B</b>: a-i, b-iii, c-iv, d-ii — not the option marked correct for this question.<br><b>Option D</b>: a-iv, b-i, c-ii, d-iii — 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 C — a-iv, b-iii, c-ii, d-i.