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Which one of the following micro-organisms is used for production of citric acid in industries?
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- Penicillium citrinum
- Aspergillus niger
- Rhizopus nigricans
- Lactobacillus bulgaris
Correct Option: B
Aspergillus niger is known as guinea pig of kingdom fungi. The main source of commercial preparation of citric acid is the fermentation of sugar with Aspergillus niger.
