This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'An infant presented to OPD with features of respiratory distress. The X-ray is shown below. The most probable organism is \nSelect and explain. \nA. S. aureus, B. S. pyogenes, C. Klebsiella, D. E.coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Staphylococcus aureus is the most dangerous of all of the many commonstaphylococcal bacteria. ... These bacteria are spread by having direct contact with an infected person, by using a contaminated object, or by inhaling infected droplets dispersed by sneezing or coughing. Ref essential paediatrics :op ghai 9e', 'role': 'assistant'}]