This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'The patient gives history of putting tobacco in buccal vestibule and chewing betel quid, the lesion is: \nSelect and explain. \nA. Pan chewer’s lesion, B. Tobacco pouch keratosis, C. Leukoplakia, D. Both 1 and 2', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tobacco pouch keratosis:\xa0A white, wrinkled change of the mucosa in the mandibular buccal vestibule secondary to the use of chewing tobacco.\nThis lesion consists of a thick brownish black encrustation on the buccal mucosa at the site of placement of the buccal quid. It is often seen among heavily addicted betel quid chewers. It could be scraped off with a piece of gauze; it regresses spontaneously; more frequently when the habit is discontinued.', 'role': 'assistant'}]