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I would pick the first option in the third option
I have attached the answer here. hope this helps!
let me know if you have any question
Answer:
10.8 ml
Explanation:
The BOD is an empirical test to determine the molecular oxygen used during a specified incubation period (usually five days), for the biochemical degradation of organic matter (carbonaceous demand) and the oxygen used to oxidise inorganic matter.
See attached file
The answer is 451.4124 argon