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Citric acid is produced commercially by
AAspergillus niger
BAcetobacter aceti
CClostridium butylicum
DLactobacillus species
Answer & Solution
Correct answer: A. Aspergillus niger
1. Several microbes are used for commercial production of organic acids.
2. Citric acid is produced by Aspergillus niger, a fungus.
3. Acetobacter aceti gives acetic acid and Clostridium butylicum gives butyric acid.
4. Lactobacillus gives lactic acid, which is a different acid again.
_Source: NCERT Class 12 Biology Ch8 'Microbes in Human Welfare'_
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