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| स्तंभ-$I$ | स्तंभ-$II$ |
|---|---|
| $(a)$ Aspergillus niger | $(1)$ लैक्टिक अम्ल |
| $(b)$ Acetobacter aceti | $(2)$ साइट्रिक अम्ल |
| $(c)$ Clostridium butyricum | $(3)$ एसिटिक अम्ल |
| $(d)$ Lactobacillus | $(4)$ ब्यूटिरिक अम्ल |
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