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: Orthopaedics
Chronic persistent neutrophilic discharge is seen in - 
Select and explain. 
A. Chronic osteomyelitis, B. Acute osteomyelitis, C. Septic arthritis, D. None
A: Chronic osteomyelitis
Answer: A: Chronic osteomyelitis 
Explanation: The commonest presenting symptom of chronic osteomyelitis is chronic discharging sinus.
Discharging sinus contains pus (i.e. mixture of neutrophils and other cells).