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: ENT
[{'content': 'A child presents with stridor, barking cough and difficulty in breathing since 2-3 days. He has fever and elevated leukocyte count. All of the following statements about his condition are true, EXCEPT: \nSelect and explain. \nA. Subglottis stenosis and hypopharyngeal dilatation may be seen on X-rays, B. Boys are more commonly affected than girls, C. Symptoms are predominantly caused by involvement of the subglottis, D. Antibiotics form the mainstay of treatment', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]