A) caffiene
B) nicotine
C) cocaine
D) histamine
Correct Answer: B
Solution :
Tobacco can be obtained from dried and cured leaves of young branches of two species of tobacco plants, Nicotiana tobaccum and N. rustica. Tobacco contain mainly nicotine, which is present in 8 to 10% in tobacco. It causes lung cancers, mouth cancer, nicotine, alkaloid causes reduced foetal growth and development in pregnant woman. It stimulates nervous system, causes muscular relaxation adrenalin secretion and increases heart rate etc.
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