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What is the threshold for sulphate levels in drinking water to cause a laxative effect?

Options

  1. A100 ppm
  2. B250 ppm
  3. C500 ppm
  4. D750 ppm

Correct answer

C. 500 ppm

Step-by-step solution

A sulphate concentration of over 500 ppm in drinking water can cause a laxative effect.

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