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': 'The most common etiological agent for acute bronchiolitis in infancy is – \nSelect and explain. \nA. Influenza virus, B. Para influenza virus, C. Rhinovirus, D. Respiratory syncytial virus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: "The most common etiological agent for Bronchiolitis is Respiratory syncytial virus. RSV is responsible for more than 50% of cases of bronchiolitis."\n\nBronchiolitis \n\nBronchiolitis is the most common serious acute lower respiratory tract infection in infants and young children.\nThe most vulnerable group is between the ages of 1 and 6 months.\nBut the disease can affect children up to 2 years.\nMore common in males.\n\nOrganisms causing bronchiolitis\n\nBronchiolitis is predominantly a viral disease.\n\ni)\xa0RSV (mostcommon)\xa0\nii) Parainfluenza virus 3, 1, 2 \xa0 \xa0\xa0 \xa0\niii) Adenovirus \xa0 \xa0\niv) Influenza virus\nv) Mycoplasma pneumoniae', 'role': 'assistant'}]