Which one of the following is considered as the drug of last resort for human beings? (1) Penicillin (2) Tetracycline (3) Chloramphenicol (4) Streptomycin

Which one of the following is considered as the drug of last resort for human beings? (1) Penicillin (2) Tetracycline (3) Chloramphenicol (4) Streptomycin
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(3) Chloramphenicol Explanation: Chloramphenicol is an antibiotic useful for the treatment of a number of bacterial infections. This includes use as an eye ointment to treat conjunctivitis.
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