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: Dental
[{'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. Arthritis, D. Discoid plaques in the face', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cicatricial alopecia with perifollicular blue-grey patches indicates in favour of lichen planus.\nWhitish lesion in buccal mucosa (Lacey pathern) is characteristic of lichen planus', 'role': 'assistant'}]