Lung cancer is most often caused by exposure to
DDT UV methane tar CFCs vapor SO2 carbon dioxide
A B C D E F G H
Tobacco smoke contains tar.
Lung cancer is most often caused by exposure to tar
Lung cancer is most often caused by exposure to (A) DDT (B) UV (C) methane (D) tar (E) CFCs (F) vapor (G) SO2 (H) carbon dioxide