Tobacco is

Cigarette : Tobacco :: ?

Tobacco smoke is rich is

Tobacco smoke contains:

Tobacco mosaic is caused by

The use of tobacco was originated in :

The use of tobacco was originated in :

Tobacco mosaic virus is

Tobacco Mosaic Virus

Coffee : Coffeine : : Tobacco : ?

Assertion: Tobacco smoking is the main cause of lung cancer. Reason: Tobacco smoke has a carcinogen called nicotine.