Question

Which of the following is a good reason for why tobacco smoke is considered a carcinogen?

Answer 1

Ans.

Carcinogens can be defined as a physical and chemical agent that leads to development of cancer (carcinogenesis), such as radiation, toxic chemicals, and tumor-causing viruses due to mutations in genetic material of cells.

Tobacco is considered as a carcinogen as it can cause lung cancer, mouth cancer, and various other types of cancer. Tobacco contains around seventy chemicals, which promote or initiate cancer and make it a potent carcinogen.

Thus, the correct answer is option). 'it causes mutations leading to cancer.'

Answer 2

It caused mutations leading to cancer because carcinogen means "a substance capable of causing cancer' according to the New Oxford American Dictionary