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: Skin
[{'content': 'Cicatrising alopecia with perifollicular blue-gray patches is most commonly associated with: \nSelect and explain. \nA. Pitting of nails, B. Whitish lesions in the buccal mucosa, C. Ahritis, D. Discoid plaques in the face', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cicatrising alopecia with perifollicular blue-gray patches is likely to be associated with whitish lesions in buccal mucosa which is characteristic of Lichen planus. Ref: Cicatricial Alopecia: An approach to diagnosis and management, By Vera Price, Paradi Mirmirani, Page 1-5.', 'role': 'assistant'}]