What substance has the lowest value of LD50 (median lethal dose)?
Sarin
Botox
Ricin
Arsenic
The value of LD50 for a substance is the dose required to kill half the members of a tested population after a specified test duration. Botox is the most acutely lethal toxin known, with an estimated human LD50 of 1.3–2.1 ng/kg intravenously or intramuscularly and 10–13 ng/kg when inhaled.
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Sarin
Botox
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Arsenic
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