You are presented with the question "What is very deadly?" and the following answer choices: 
- sticks
 - truth
 - insults
 - Pesticides
 - chlorofluorocarbons
 - Tobacco smoke
 - Electrical energy
 - forest is destroyed

Now knowing that lung cancer is most often caused by exposure to tobacco smoke and lung cancer is the deadliest of all cancers, choose the best answer.


 

      Tobacco smoke   