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: ENT
[{'content': 'Herpes zoster oticus is caused by- \nSelect and explain. \nA. Herpes virus type I, B. Herpes virus type 2, C. Herpes virus type 3, D. Herpes virus type 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Herpes virus type 3Herpes Zoster oticus or Ramsay - Hunt syndrome is caused by varicella (herpes) Zoster virus also know as Human herpes virus type-3.', 'role': 'assistant'}]