A compound which is produced by an organism and inhibits the growth of other organisms is called
Antigen
Antibody
Antibiotic
Antiallergic
A good producer of citric acid is
$A$ : Newer antibiotics are required to be produced regularly.
$R$ : Pathogens often develop resistance to existing antibiotics.
Which of the following is correctly matched for the product produced by them?
Identify correct pair :
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and Curd