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      Question

      Which physiological condition in plants is indicated by

      curling and drying of leaf margins, often due to potassium deficiency?
      A Leaf scorch Correct Answer Incorrect Answer
      B Tip burn Correct Answer Incorrect Answer
      C Leaf roll Correct Answer Incorrect Answer
      D Marginal necrosis Correct Answer Incorrect Answer

      Solution

      Potassium deficiency typically causes yellowing and browning along leaf margins (marginal necrosis). Potassium is essential for enzyme activation and water regulation.

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