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      Question

      The mineral source of plant nutrient Boron whose

      deficiency leads to pollen sterility is 
      A Apatite Correct Answer Incorrect Answer
      B Biotite Correct Answer Incorrect Answer
      C Dolomite Correct Answer Incorrect Answer
      D Tourmaline Correct Answer Incorrect Answer

      Solution

      Tourmaline : Boron Apatite: Phosphorus Biotite: Potassium Dolomite: Magnesium

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