What is the acceptable safe limit of Arsenic per liter of water?

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প্রশ্নঃ What is the acceptable safe limit of Arsenic per liter of water?

  • ক. 0.01 mg
  • খ. 0.001 mg
  • গ. 0.20 mg
  • ঘ. 0.02 mg

সঠিক উত্তরঃ

0.01 mg
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