QUESTION 15 In toxicology studies, LD$_{50}$ can be best described as _______. O the dose at which 50% of an exposed population develops disease O the dose at which 50% of an exposed population is killed or displays a specific symptom O the dose at which 50% of an exposed population develops a chronic effect from the toxicant O the dose in which at least 50% of the exposed population is not affected by the toxicant O the does in which more than 50% of the population dies as a result of the toxicant development
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