This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Maximum infection of CMV is seen after what duration post transplantation ? \nSelect and explain. \nA. Immediate, B. < 1 month, C. 1-4 months, D. > 6 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .Therapeutic invasive procedures may be in the form of IV cannula, bladder catheter, tracheostomy and other minor surgical procedures which permit the skin organisms like staphylococcus epidermidis to penetrate the skin and invade the deeper tissues. Organisms Bacteria: Gram-negative: E. coli, Pseudomonas, Klebsiella, Proteus, Serratia. Gram-positive: Staphylococcus epidermidis, Streptococcus pneumoniae. Viruses: Herpes, CMV, Varicella zoster, may cause fatal pneumonia. ref:SRB&;s manual of surgery,ed 3,pg no 59', 'role': 'assistant'}]