Q.Name the following: The hydrocarbon said to possess carcinogenic property.

Benzene is both toxic (its vapour can cause unconsciousness on inhalation) and, separately, carcinogenic -- sometimes described as 'the mother of all carcinogens' because a large number of known carcinogenic compounds are structurally built around one or more benzene rings. Polycyclic aromatic compounds (fused rings of more than two benzene units) form as byproducts of the incomplete combustion of tobacco, coal and petroleum, and are a major real-world source of human exposure. Inside the body, in the liver, benzene itself is metabolically oxidised to an epoxide, and related polycyclic compounds …