<prompt>  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:Subglottis stenosis and hypopharyngeal dilatation may be seen on X-raysBoys are more commonly affected than girlsSymptoms are predominantly caused by involvement of the subglottisAntibiotics form the mainstay of treatment 