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
Cicatrising alopecia with perifollicular blue–gray patches is most commonly associated with – 
Select and explain. 
A. Pitting of nails, B. Whitish lesions in the buccal mucosa, C. Arthritis, D. Discoid plaques in the face
B: Whitish lesions in the buccal mucosa
Answer: B: Whitish lesions in the buccal mucosa 
Explanation: Cicatricial alopecia with perifollicular blue-grey patches indicates in favour of lichen planus.
Whitish lesion in buccal mucosa (Lacey pathern) is characteristic of lichen planus