This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
The most common hospital-acquired (nosocomial) infection is - 
Select and explain. 
A. Urinary tract infection, B. Pneumonia, C. Surgical wound infection, D. Bacteremia
A: Urinary tract infection
Answer: A: Urinary tract infection 
Explanation: The most common hospital-acquired infection is urinary tract infection (UTI), which accounts for almost 40% of all nosocomial infections . Most hospital-acquired UTIs are associated with urinary catheters, a commonly used device among hospitalized patients. Ref Davidson 23rd edition pg 630