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      Question

      Which of the following is a source of

      Boron?
      A Pyrite Correct Answer Incorrect Answer
      B Augite Correct Answer Incorrect Answer
      C Apatite Correct Answer Incorrect Answer
      D Tourmaline Correct Answer Incorrect Answer
      E Olivine Correct Answer Incorrect Answer

      Solution

      Tourmaline is source of Boron.

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