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Question
Which of the following have been used to oxidize ammonia and to prevent algal growth?
Options:
A .  growth of hypomicrobium in presence of added methanol
B .  Micrococcus denitrificans cells encapsulated in liquid membranes
C .  Both (a) and (b)
D .  Nitrosomonas europaen
Answer: Option D
Answer: (d).Nitrosomonas europaen

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