What are the main constituents of biogas?

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প্রশ্নঃ What are the main constituents of biogas?

  • ক. butane and carbon-dioxide
  • খ. methane and carbon-monoxide
  • গ. methane and carbon-dioxide
  • ঘ. ethylene and carbon-dioxide

সঠিক উত্তরঃ

methane and carbon-dioxide
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