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: Medicine
All of the following statements about Pneumococcal Pneumonia are true, except 
Select and explain. 
A. Non-segmental Consolidation, B. Air Bronchogram Absent, C. Usually confined to one lobe, D. Cavitation is rare
A: Non-segmental Consolidation
Answer: A: Non-segmental Consolidation 
Explanation: Ans. is 'b' i.e., Air Bronchogram Absent Air bronchogram refers to the phenomenon of air filled bronchi (dark) being visible by the opacification of the surrounding alveoli (grey/white). Air bronchogram is common in consolidation or in any condition in which something replaces the air spaces. Air bronchogram commonly signifies alveolar disease (any cause of consolidation). On a normal radiograph, the bronchi are not normally visible. During consolidation the alveoli do not contain air due to the replacement of the air spaces. When the alveoli no longer contain and opacify, the air filled bronchi passing through the same area may be visible as branching lineur lucencies