How many compounds of tar in tobacco smoke are involved in causing cancer?
Correct answer: D. More than 10
- A. 2
- B. 5
- C. 8
- D. More than 10
Explanation
Option A: There are more than 2 compounds in tar that are involved in causing cancer. The actual number is higher. Option B: There are more than 5 compounds in tar that are involved in causing cancer. The actual number is higher. Option C: There are more than 8 compounds in tar that are involved in causing cancer. The actual number is higher.Option D: Tar in tobacco smoke contains more than 10 compounds that are known to cause cancer. These compounds include polycyclic aromatic hydrocarbons (PAHs), nitrosamines, benzene, formaldehyde, and other toxic chemicals. Smoking is the leading cause of preventable deaths worldwide, and quitting smoking or never starting is the best way to reduce the risk of developing tobacco-related cancers.
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About Effects of Smoking
Smoking exposes the respiratory system to nicotine, tar and carbon monoxide, damaging cilia, reducing oxygen transport and narrowing or inflaming airways. The topic covers dependence, chronic bronchitis, emphysema, lung cancer and cardiovascular effects, while separating short-term physiological changes from long-term disease.
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