A) acts on all bacteria and virus
B) is effective in very small amount
C) acts on both pathogen and host
D) acts on a variety of pathogenic micro organisms
Correct Answer: D
Solution :
Antibiotics are substances that destroy or inhibit the growth of micro-organisms, particularly disease-producing bacteria and fungi. They are obtained from micro-organisms or synthesized. Broad spectrum antibiotics are the antibiotics, which have the ability to act on several pathogenic species differing from each other in structure and composition of cell wall.
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