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#58239 Bangla Language & Literature অধাতু Level 0

পানীয় জলে সচরাচর সবচেয়ে বেশী disinfectant (জীবাণু ধ্বংসকারক) ব্যবহার করা হয়-

  1. A ক্লোরিন
  2. B চুন
  3. C নাইট্রোজেন
  4. D ফিটকিরি
Answer: A - ক্লোরিন

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