A) Aspergillums
B) Pseudomonas
C) Clostridium
D) Saccharomyces
Correct Answer: A
Solution :
A good producer of citric acid is Aspergillus niger (a fungus). Clostridium produces butyric acid, Saccharomyces cerevisiae is used for bread baking fermenting mailed cereals and fruit juices to produce ethanol. Pseudomonas (a bacterium) is used in vitamin-B12 production.
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