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: Microbiology
[{'content': 'A 40 year old man underwent kidney transplantation. Two month after transplantation,\nhe developed fever and feature suggestive of bilateral diffuse interstitial pneumonia. Which of the following is most likely etiologic agent ? \nSelect and explain. \nA. Herpes simplex virus, B. Cytomegalovirus, C. Epstein-barr virus, D. Varicella - zoster virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is a case of diffuse interstitial pneumonitis due to CMV.\n\nRemember :\n\nCMV is the MC infection complicating organ transplantation.\nCMV is MC cause of intrauterine infection.\nRisk of post transplant CMV infection is greatest 5-13 weeks after transplant.\n\nInfections after Kidney Transplantation', 'role': 'assistant'}]