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
Grinspan syndrome is associated with 
Select and explain. 
A. Leukoplakia, B. Lichen planus, C. Aphthous ulcer, D. Oral submucous fibrosis
B: Lichen planus
Answer: B: Lichen planus 
Explanation: None