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
[{'content': '“Church spire effect” is shown by \nSelect and explain. \nA. Verruca vulgaris, B. Pamphigus vulgaris, C. Pamphigus vegetans, D. Verrucous papillary outgrowth', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]