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': 'True about neonatal sepsis \nSelect and explain. \nA. Early sepsis is due to organism in maternal genital tract, B. Environmental factors cause late sepsis, C. Late sepsis is due to organism in maternal genital tract, D. Environmental factors cause early sepsis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Neonatal sepsis is a type of neonatal infection and specifically refers to the presence in a newborn baby of a bacterial blood stream infection (BSI) (such as meningitis, pneumonia, pyelonephritis, or gastroenteritis) in the setting of fever. Older textbooks may refer to neonatal sepsis as "sepsis neonatorum". Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]