Tobacco contains an intoxicating substance called _____.

Nicotine

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Sugar

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Fibre

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None of these

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Solution

The correct option is A Nicotine
Tobacco is a plant grown for its leaves, which are dried and fermented before being put in tobacco products. Tobacco contains nicotine, the ingredient that can lead to addiction. Nicotine acts in the brain by stimulating the adrenal glands to release the hormone epinephrine (adrenaline) and by increasing levels of the chemical messenger dopamine.

Hence, option A is the correct answer.

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