Which items are examples of poisons?

Which items are examples of poisons?

• A. Strychnine and arsenic
• B. Water and salt
• C. Oxygen and nitrogen
• D. Sand and gravel

Answer: (A)

Poisons are substances that can cause harm or death with exposure, even in small amounts. Strychnine and arsenic are classic toxic agents whose effects occur at low doses, so they fit the definition of poisons. Water and salt are essential for life; they can be harmful only in extreme misuse or imbalance, but they aren’t classified as poisons in normal hazard terms. Oxygen and nitrogen are common gases; they aren’t poisons themselves, though lack of oxygen or certain exposures can be hazardous, they don’t meet the typical poison classification. Sand and gravel are inert materials with no toxic effects under ordinary conditions. So the items that illustrate poisons are strychnine and arsenic.

Poisons are substances that can cause harm or death with exposure, even in small amounts. Strychnine and arsenic are classic toxic agents whose effects occur at low doses, so they fit the definition of poisons. Water and salt are essential for life; they can be harmful only in extreme misuse or imbalance, but they aren’t classified as poisons in normal hazard terms. Oxygen and nitrogen are common gases; they aren’t poisons themselves, though lack of oxygen or certain exposures can be hazardous, they don’t meet the typical poison classification. Sand and gravel are inert materials with no toxic effects under ordinary conditions. So the items that illustrate poisons are strychnine and arsenic.