Match the following list of bacteria and their commercially important products:

Choose the correct match:

A. Aspergillus niger – iv. Citric acid

Explanation:Aspergillus niger is a fungus which is commercially used for the production of citric acid. Citrate is converted to citric acid by Aspergillus niger.

B. Acetobacter aceti – iii. Acetic acid

Explanation: Acetobacter aceti is a bacteria which is used to convert ethanol into acetic acid.

C. Clostridium butylicum – ii. Butyric acid

Explanation: Clostridium butylicum is a bacteria which is used for the commercial production of butyric acid by metabolic engineering.

D. Lactobacillus – i. Lactic acid

Explanation: Lactobacillus is a group of bacteria which are used in the production of curd and yogurt from milk. They convert the lactose protein of the milk into lactic acid.