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': "Bullae formation after striking an intact skin/mucosal surface is known as: \nSelect and explain. \nA. Tine's sign, B. Bablnski's sign, C. Nikolsky's sign, D. Chovstek's sign", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]