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| स्तंभ-$I$ (सूक्ष्मजीव) | स्तंभ-$II$ (कार्बनिक अम्ल) |
|---|---|
| $a$. Aspergillus niger | $(i)$ ब्यूटिरिक अम्ल |
| $b$. Clostridium butylicum | $(ii)$ साइट्रिक अम्ल |
| $c$. Acetobacter aceti | $(iii)$ लैक्टिक अम्ल |
| $d$. Lactobacillus | $(iv)$ एसिटिक अम्ल |
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