Which one of the following is an air-pollutant present in the atmosphere?

সাধারণ বিজ্ঞান Basic Information of Daily Science, Inventions and... 07 Oct, 2020

প্রশ্ন Which one of the following is an air-pollutant present in the atmosphere?

  • ক.
    nitrogen
  • খ.
    hydrogen
  • গ.
    oxygen
  • ঘ.
    carbon monoxide

সঠিক উত্তর

carbon monoxide

মন্তব্য

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