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      Question

      Which one of the following is a contaminant?

      A Urea Correct Answer Incorrect Answer
      B Pesticides Correct Answer Incorrect Answer
      C Iron filings in tea Correct Answer Incorrect Answer
      D All of the mentioned Correct Answer Incorrect Answer

      Solution

      Substances which are urea, pesticides, iron filings in tea etc are considered as one of the harmful substances for consumption especially for humans. 

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