Match Column-I (microbes) to the Column-II (biological products)
Match column I with column II and select the correct option.
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