A dog was estimated to be exposed to a dosage of 1 mg/kg bod…

A dog was estimated to be exposed to a dosage of 1 mg/kg body weight of an unknown compound. Of the five toxicants on your differential list (Toxic Differentials 1-5), with the following LD50 values, which one is MOST likely to be lethal to the dog OR cause the most severe adverse health effects at this dosage?