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আর্সেনিক দূরীকরণ সনো ফিল্টারের উদ্ভাবক -

  1. A অধ্যাপক আবদুস সালাম
  2. B অধ্যাপক আবুল হুসসাম
  3. C আধ্যাপক আবদুল গণি
  4. D মোস্তফা জব্বার
Answer: B - অধ্যাপক আবুল হুসসাম

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