I want to know if i will get cancer if i quit smoking suddenly after 2 years ?

Probably not: Quitting smoking is one of the healthiest things you can do, and lowers your risk of cancer. Tobacco has 50 (fifty!) known carcinogens, plus carbon monoxide. So there's no safe level. But, some cells that grow and work better when you stop, such as the lining of your windpipe (cilia). In very rare cases, cancer is found after quitting, but it probably was there earlier, or, due to secondhand smoke.

Probably not but...: The more and longer you smoke the greater your risk of cancer. If you quit after 2 years your odds of getting cancer are small and will dramatically decrease. However, if you continue to smoke your risk of cancer will increase with each cigarette you smoke. For more details on ways to quit see http://altmedicine.About.Com/od/therapiesfromrtoz/a/quit_smoking.Htm ; www.Shareguide.Com/smoking.Html.

Quitting & cancer: the quitting (suddenly, progresively, orotherwise) won't cause cancer. It will reduce your risk! Smoking, however, does cause cancer. see all the other good answers to this question as well. then quit! you can! no risk. all reward!