Match List - I with List - II.

Choose the correct answer from the options given below:

A-III, B-I, C-IV, D-II

The correct answer is Option (2) - A-III, B-I, C-IV, D-II

A. Lactobacillus: Lactobacillus is a group of bacteria that is commonly used in the production of lactic acid through fermentation.

B. Aspergillus niger: Aspergillus niger is a fungus used in the production of citric acid, which is widely used in the food and beverage industry.

C. Acetobacter aceti: Acetobacter aceti is a bacterium that is used to produce acetic acid, commonly known as vinegar.

D. Clostridium butylicum: Clostridium butylicum is a bacterium used in the production of butyric acid, which has various industrial applications.

These matches describe the microbes and the specific organic acids they are associated with in various industrial processes.