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Smoking addiction is harmful because it ...

Smoking addiction is harmful because it produces polycycllic aromatic hydrocarbons which cause :

A

Reduction in oxygen transport

B

Decrease in blood pressure

C

Cancer

D

Enhancement of growth of the foetus

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The correct Answer is:
To solve the question regarding the harmful effects of smoking addiction due to the production of polycyclic aromatic hydrocarbons (PAHs), we will analyze the options provided and determine which one is correct based on the information given. ### Step-by-Step Solution: 1. **Understanding Polycyclic Aromatic Hydrocarbons (PAHs)**: - PAHs are a group of organic compounds that consist of multiple fused aromatic rings. They are known to be toxic and carcinogenic. - In the context of smoking, PAHs are produced when tobacco is burned and are present in tobacco smoke. 2. **Analyzing the Options**: - **Option A: Reduction in oxygen transport**: - While smoking can lead to reduced oxygen transport due to carbon monoxide binding to hemoglobin, this is not the primary concern associated with PAHs. - **Option B: Decrease in blood pressure**: - This is incorrect. Smoking typically leads to increased blood pressure due to the constriction of blood vessels. - **Option C: Cancer**: - PAHs are known carcinogens, meaning they can cause cancer. This is a well-established fact in medical research, particularly with lung cancer and oral cancer being common among smokers. - **Option D: Enhancement of growth of the fetus**: - This option is misleading. Smoking during pregnancy is associated with fetal abnormalities and complications, not enhancement of growth. 3. **Conclusion**: - The most accurate answer to the question is **Option C: Cancer**, as polycyclic aromatic hydrocarbons are indeed carcinogenic and are a significant risk factor for developing various types of cancer. ### Final Answer: **C: Cancer**
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