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: Pathology
Secondary pulmonary tuberculosis usually involves:March 2012 
Select and explain. 
A. Base of lungs, B. Apex of lungs, C. Middle lobes, D. Lower lobes
B: Apex of lungs
Answer: B: Apex of lungs 
Explanation: Ans: B i.e. Apex of lungsSecondary pulmonary TB classically involves the apex of the upper lobes of one or both the lungsProgressive primary TB more often resembles an acute bacterial pneumonia, with lower and middle lobe consolidation, hilar adenopathy, and pleural effusion; cavitation is rare.