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JEE Main levelSingle correct optionDifficulty 2 of 3el075

According to the standard NCERT classification, which of the following is a narrow-spectrum antibiotic?

  1. ATetracycline
  2. BOfloxacin
  3. CChloramphenicol
  4. DPenicillin G

Answer: D

Penicillin G acts mainly on Gram-positive bacteria and is classed as narrow spectrum. Chloramphenicol, tetracycline and ofloxacin act on a wide range of Gram-positive and Gram-negative bacteria.
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