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Foul smell in the water of tanks, ponds etc. is due to

Foul smell in the water of tanks, ponds etc. is due to

Q. Foul smell in the water of tanks, ponds etc. is due to

  1. Anaerobiosis
  2. Aerobiosis
  3. Biological magnification
  4. Psammophytes

Answer: Anaerobiosis

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