This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Viral infections, Subject name: Dental
[{'content': "White patches due to degenerated squamous epithelium occurring on buccal mucosa and gums is known as: \nSelect and explain. \nA. Coup D'Ongle sign, B. Compy's sign, C. Darier's sign, D. Pseudodarier's sign", 'role': 'user'}, {'content': "Answer: B \nExplanation: Compy's sign in measles: Appearance of white patches due to degenerated squamous epithelium occurring on buccal mucosa and gums. Darier's sign: Uicaria pigmentosa Pseudodarier's sign: Smooth ms hamaoma Coup D'Ongle sign: Pityriasis versicolor", 'role': 'assistant'}]