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
Most common Nosocomial infection ? 
Select and explain. 
A. Pneumonia, B. UTI, C. Surgical wound infection, D. Nephritis
B: UTI
Answer: B: UTI 
Explanation: Ans. is 'b' i.e., UTI Most common nosocomial infection - Urinary tract infection. Most of the nosocomial UTIs occur after urinary catheterization. Second most common nosocomial infection - Pneumonia. Most of the nosocomial pneumonias are acquire through respiratory intubation, mechanical ventilation and suction of the material from mouth.