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
A patient in an ICCU is on CVP line. His blood culture shows growth of Gram +ve cocci which
are catalase positive and coagulase negative. The most likely etiological agent is: 
Select and explain. 
A. Staph. aureus, B. Staph. epidermidis, C. Streptococcus pyogenes, D. Enterococcus faecalis
B: Staph. epidermidis
Answer: B: Staph. epidermidis 
Explanation: None