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Question
The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?
Options:
A .  Indole test
B .  Methyl red test
C .  Citrate utilization test
D .  Voges-Proskauer test
Answer: Option B
Answer: (b).Methyl red test

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