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
Most common disease caused by CMV in post-bone-marrow transplant patients - 
Select and explain. 
A. Pyelonephritis, B. Meningitis, C. Pneumonia, D. Gl ulceration
C: Pneumonia
Answer: C: Pneumonia 
Explanation: Pneumonia is the most common disease caused by CMV in post-bone-marrow transplant patients -