Occupational and Environmental Health 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What substance caused severe birth defects from contaminated food, affecting offspring even when the mothers were relatively asymptomatic?

Thalidomide

PCBs

Mercury

Mercury is the correct answer as it is a toxic substance that can cause birth defects when ingested by pregnant women. Thalidomide is incorrect because while it also caused birth defects, it was not found in contaminated food but rather was a prescribed medication for morning sickness. PCBs and DDT are incorrect because while they are also toxic substances, they do not specifically cause severe birth defects in offspring. Overall, mercury was the only substance listed that meets all the criteria provided in the question.

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DDT

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