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: Ophthalmology
Most Common infection in Contact Lens user is 
Select and explain. 
A. Acanthamoeba, B. Pneumococcus, C. Pseudomonas, D. Staphylococcus aureus
C: Pseudomonas
Answer: C: Pseudomonas 
Explanation: Most Common infection in Contact Lens user is Pseudomonas