The statement "People who quit smoking" is incomplete and cannot be evaluated as true or false. However, if this statement is meant to imply something positive about quitting smoking, it would generally be considered true that people who quit smoking reduce their health risks, including the risk of lung cancer.
If you're looking for the statement that is most likely to be false among the complete statements provided, they all appear to be supported by research regarding the dangers of smoking and its effects on health.
If this is a quiz context and you’re looking for an "incorrect" option, you might want to provide more context or complete the last statement for a more accurate response.