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: Pediatrics
What is the most common organism causing cerebrospinal fluid shunt related infections 
Select and explain. 
A. Streptococcus agalactiae, B. E. coli, C. Coagulase Negative Staphylococcus aureus, D. Enterococccus
C: Coagulase Negative Staphylococcus aureus
Answer: C: Coagulase Negative Staphylococcus aureus 
Explanation: Coagulase Negative Staphylococcus aureus colonize the skin and hence cause CSF shunt related infections.