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: Surgery
All are true about alveolar osteitis except? 
Select and explain. 
A. It is caused by fibrinolysis of the clot on the 3rd - 4th post-operative day, before formation of granulation tissue, B. Incidence is higher in smokers and females on oral contraceptives, C. Main aim of the treatment is prevention of pus formation, D. Treatment is socket irrigation and placement of obtundent dressing
C: Main aim of the treatment is prevention of pus formation
Answer: C: Main aim of the treatment is prevention of pus formation 
Explanation: Main aim of the treatment in dry socket is to relieve the patient's pain.