The carcinogenic ingredient of tobacco smoke is

Nicotine

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Polycyclic aromatic hydrocarbon

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Carbon monoxide

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Tar

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Solution

The correct option is B Polycyclic aromatic hydrocarbon
Polycyclic aromatic hydrocarbons are a group of chemicals that are formed during the incomplete burning of coal, oil, gas, wood, garbage or other organic substances, such as tobacco and charbroiled meat.
They are the carcinogenic or cancer-causing substance in the tobacco smoke.
Therefore, the correct answer is option B.

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