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: Anatomy
Which of the following statements about lung carcinoma is true 
Select and explain. 
A. Squamous cell variant accounts for 70% of all lung cancer, B. Oat cell variant typically present with cavitation, C. Oat cell variant is typically associated with hilar adenopathy, D. Adenocarcinoma variant is typically central in location
C: Oat cell variant is typically associated with hilar adenopathy
Answer: C: Oat cell variant is typically associated with hilar adenopathy 
Explanation: Small cell carcinoma usually occurs in central bronchi with associated mediastinal and hilar adenopathy being a common presentation at time of diagnosis Ref Harrison 19th edition pg 515