alleryStart learning →By how much is lung cancer risk raised in a non-smoker who lives with someone who smokes indoors?
ABy up to 30 percent
BBy up to 3 percent
CBy up to 90 percent
DBy up to 60 percent
Answer & Solution
Correct answer: A. By up to 30 percent
1. Exposure to second-hand smoke can cause lung cancer in people who never smoke themselves.
2. The comparison is between non-smokers living with an indoor smoker and non-smokers not regularly exposed.
3. The risk of developing lung cancer is raised by up to 30 percent in the exposed group.
4. So the first option is correct.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.2 The Lungs_
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