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: Skin
[{'content': 'Ballooning is characteristic of : \nSelect and explain. \nA. Harpes zoster, B. Pemphigus, C. Pemphigoid, D. Insect bite', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Herpes zoster', 'role': 'assistant'}]