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: Ophthalmology
[{'content': 'Systemic coicosteroids in herpes zoster ophthalmicus are indicated when associated with \nSelect and explain. \nA. Facial nerve palsy, B. Optic neuritis, C. Post-herpetic neuralgia, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Optic neuritis', 'role': 'assistant'}]