This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
In a surgical post-op Ward , a patient developed a wound infection . Subsequently 3 other patients developed similar infections in the ward. What is the most effective way to limit the spread of infection 
Select and explain. 
A. Fumigation of the ward, B. Give antibiotics to all the other patients in ward, C. Proper handwashing of all ward personnel's, D. Wash ot instruments with 1% perchlorate
C: Proper handwashing of all ward personnel's
Answer: C: Proper handwashing of all ward personnel's 
Explanation: Given the prominence of cross infection , hand washing is the single most impoant preventive measure in the hospital . Use of alcohol hand rubs between patient contacts is now recommended for all health Care workers except when the hands are visibly soiled , in which case washing with the soap and water is required - Harrison 15/e