This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pediatrics
Most common pulmonary tumor in children is ___________ 
Select and explain. 
A. Carcinoid, B. Small cell carcinoma, C. Adeno carcinoma, D. Squamous cell carcinoma
A: Carcinoid
Answer: A: Carcinoid 
Explanation: Cancer of the lung occurs most often between the ages 40-70.Only 2% of the whole cases appear before 40 years. Carcinoid tumour represent 1%-5%of all lung tumors.Most patients with this tumor are younger than 40 years of age and the incidence is equal for both sexes.Clinical features include persistant cough, hemoptysis,impairment of drainage of respiratory passages with secondary infections,bronchiectasis,emphysema. Ref : ROBBINS AND COTRAN PATHOLOGIC BASIS OF DISEASES,PG NO:763,7 th edition