This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pathology
1 month post renal transplant a patient developed fever. Which of the following is the most likely organism responsible? 
Select and explain. 
A. Polyoma virus/BK virus, B. Hepatitis C virus, C. Varicella virus, D. HHV-6
B: Hepatitis C virus
Answer: B: Hepatitis C virus 
Explanation: Ans. (b) Hepatitis C virus(Ref: Harrison 18th/Chapter 282)Most Common Opportunistic Infections in Renal Transplant RecipientsPeri-transplant (<1 month)Early (1-6 months)Late (>6 months)* Wound infections* Herpesvirus* Oral candidiasis* Urinary tract infection* Pneumocystis carinii* Cytomegalovirus* Legionella Listeria* Hepatitis B* Hepatitis C* Aspergillus Nocardia* BK virus (polyoma)* Herpes zoster* Hepatitis B* Hepatitis C