Below are listed the LD-50 values for toxins from specific isolates of a bacterial species. Which toxin would be considered the "most lethal"? Diptheria toxin                      .                       .1 mg/kg Clostridium difficile enterotoxin A              .5 mg/kg V. cholerae toxin                                          250 mg/kg B. pertussis toxin                                         15 mg/kg   a)diptheria toxin b)enterotoxin A c)V. cholerae toxin d)B. pertussis toxin

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