Which one of the following is most carcinogenic, present in tobacco smokeless products?
A
Nicotine
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B
Benzopyrene
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C
Caffeine
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D
Tar
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Solution
The correct option is D Benzopyrene Benzopyrene is a polycyclic aromatic hydrocarbon found in coal tar with the formula C20H12. Its metabolites are mutagenic and highly carcinogenic, and it is listed as a Group I carcinogen by the IARC. Benzopyrene has since been identified as a prime carcinogen in cigarette smoke. When the body attempts to metabolise benzopyrene, the resulting diol epoxide reacts and binds to DNA, resulting in mutations and eventually cancer.