Correct Option: B

If foods are overheated or burnt, a group of carcinogenic substances called polycyclic aromatic hydrocarbons (PAHs) are produced. PAHs represent a very large group of compounds. Chemically, they consist of fused aromatic rings made up of carbon and hydrogen atoms. After being ingested, PAHs can be absorbed in the intestine and distributed to other organs through blood circulation. Besides cancercausing, PAH exposure is also associated with many adverse effects in laboratory animals, including reproductive toxicity, cardiovascular toxicity, bone marrow toxicity, immune system suppression, and liver toxicity.