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Question

Citric acid is produced by

A
Clostridium butylicum
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B
Lactobacillus
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C
Aspergillus niger
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D
Acetobacter aceti
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Solution

The correct option is C Aspergillus niger
The following are the acid producing microbes:
  • Aspergillus niger (a fungus) - citric acid
  • Acetobacter aceti (a bacterium) - acetic acid
  • Clostridium butylicum (a bacterium) - butyric acid
  • Lactobacillus (a bacterium) - lactic acid.

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