This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Herpes - Zoster is caused by - 
Select and explain. 
A. Herpes - simplex type I, B. Herpes - simplex type II, C. Epstein - barr virus, D. Varicella
D: Varicella
Answer: D: Varicella 
Explanation: Herpes zoster usually occurs in person who had chickenpox several years earlier,which is caused by varicella REF:ANANTHANARYANAN TEXTBOOK OF MICROBIOLOGY 9th EDITION PGNO.472