| स्तंभ-$I$ (सूक्ष्मजीव) | स्तंभ-$II$ (उत्पाद) |
| $(I)$ Aspergillus niger | $(p)$ लैक्टिक एसिड |
| $(II)$ Acetobacter aceti | $(q)$ एसिटिक एसिड |
| $(III)$ Lactobacillus | $(r)$ साइट्रिक एसिड |
| $(IV)$ Clostridium butylicum | $(s)$ ब्यूटिरिक एसिड |
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