This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Microbiology
Herpes zoster ophthalmicus is caused by: 
Select and explain. 
A. VZV, B. HPV, C. HSV, D. CMV
A: VZV
Answer: A: VZV 
Explanation: Zoster ophthalmicus is caused by Varicella zoster virus. It is a complication of herpes zoster. Other complications of herpes zoster are-* Post herpetic neuralgia* Ramsay hunt syndrome* Pneumonia