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: Pediatrics
[{'content': 'Which is the most common organism causing chronic lung disease in patients with cystic fibrosis? \nSelect and explain. \nA. Pseudomonas aeruginosa, B. Burkholderia cepacia, C. Pleisomonas, D. Aeromonas', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pseudomonas aeuroginosa is the most common organism causing chronic lung disease in patients with cystic fibrosis. In young children with cystic fibrosis, Staphylococcus aureus and Hemophilus influenzae are the most common pathogens. The prevelance of Pseudomonas aeruginosa increases with increasing age.', 'role': 'assistant'}]