Match the following (column-I with column-II).

Column-I (Microbes)		Column-II (Organic acid)
A.	Aspergillus niger	(i)	Butyric acid
B.	Clostridium butylicum	(ii)	Citric acid
C.	Acetobacter aceti	(iii)	Lactic acid
D.	Lactobacillus	(iv)	Acetic acid

 

 

 

 

 

 

The correct answer is A-(ii), B-(i), C-(iv), D-(iii)

Explanation:

• Aspergillus niger: This fungus is widely used in the industrial production of citric acid. It is known for its high yield of citric acid, which is used in food, pharmaceuticals, and other industries. 
• Clostridium butylicum: This bacterium is known for producing butyric acid, which is used in the synthesis of various chemicals and as a flavoring agent. 
• Acetobacter aceti: This bacterium is used in the production of acetic acid, which is commonly known as vinegar. It is essential in food preservation and as a condiment. 
• Lactobacillus: This genus of bacteria is involved in the production of lactic acid, which is used in the dairy industry, pharmaceuticals, and as a preservative. Hence, D-(iii) is correct.