Match the following list of bacteria and their commercially important products:
Match the following list of bacteria and their commercially important products:
| Bacterium | Product |
| (i) Aspergillus niger | (a) Lactic acid |
| (ii) Acetobacter aceti | (b) Butyric acid |
| (iii) Clostridium butylicum | (c) Acetic acid |
| iv) Lactobacillus | (d) Citric acid |
Choose the correct match:
a. i b, ii c, iii d, iv a
b. i b, ii d, iii c, iv a
c. i d, ii c, iii b, iv a
d. i d, ii a, iii c, iv b
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