Question

Out of 4000 chemicals released by cigarette, potent carcinogens are

• A. 12
• B. 43
• C. 216
• D. 172

Answer 1

The correct option is B 43

A substance that causes cancer is called a carcinogen. Cigarette smoke contains more than 4,000 chemicals out of which 43 are carcinogenic. Some of the carcinogens are nicotine, formaldehyde, benzene, carbon monoxide, etc. Most of the cigarette smoke remains in the lungs. This smoke damages the lung walls causing cancer. Thus the correct answer is option B.