| List-$I$ | List-$II$ |
| $(a)$ Aspergillus niger | $(i)$ Acetic Acid |
| $(b)$ Acetobacter aceti | $(ii)$ Lactic Acid |
| $(c)$ Clostridium butylicum | $(iii)$ Citric Acid |
| $(d)$ Lactobacillus | $(iv)$ Butyric Acid |
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| Type of microbes | Scientific name | Commercial product |
| Bacterium | $a$ | Clot buster enzyme |
| $b$ | Aspergillus niger | Citric acid |
| Fungus | Trichoderma polysporum | $c$ |
| Bacterium | $d$ | Butyric acid |
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