This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
[{'content': 'After 5 days of birth, a baby develops poor feeding, fever and convulsions; CSF examination shows low sugar and high proteins. The most likely cause of these symptoms: \nSelect and explain. \nA. L. monocytogenes, B. Meningococcus, C. S. pneumonia, D. Leptospira', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. L. monocytogenesThis child has symptoms of meningitis; the most common cause of neonatal meningitis is Group B Streptococcus, and E. coli. Other known causes are Klebsiella, S. aureus, and Listeria.', 'role': 'assistant'}]