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      Question

      Which one of the following is an essential element to

      the plants?
      A Strontium (Sr) Correct Answer Incorrect Answer
      B Nickel (Ni) Correct Answer Incorrect Answer
      C Chromium (Cr) Correct Answer Incorrect Answer
      D Arsenic (As) Correct Answer Incorrect Answer

      Solution

      Ni is one of the 17 essential elements for plants.

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