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: Pediatrics
Pneumothorax could be a complication of – 
Select and explain. 
A. Staphylococcal pneumonia, B. Pneumococcal pneumonia, C. Klebsiella pneumonia, D. Viral pneumonia
A: Staphylococcal pneumonia
Answer: A: Staphylococcal pneumonia 
Explanation: Staphylococcal pneumonia is the most common cause of (amongst all pneumonia)

Purulent pericarditis
Pneumatoceles
Pneumothorax
Lung abscess
Empyema
Other organisms commonly causing empyma → Streptococcus pyogenes, Pneumococci