People addicted to smokeless tobacco can develop thick, leathery white spots in the mouth. what are these spots called?
a. emphysema
b. leukoplakia
c. mouth ulcers

Answer – B (leukoplakia)
 Leukoplakia is a condition in which thick, leathery white spots develop in the mouth. Smoking is the leading cause of leukoplakia, so people addicted to smokeless tobacco at a very high risk of developing the disease. Mild leukoplakia is generally harmless and would typically resolve on its own but more severe cases may be linked to oral cancer.

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