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
Which of the following, if left untreated is most likely to result in periapical lesion? 
Select and explain. 
A. Internal resorption, B. Focal reversible pulpitis, C. Acute suppurative pulpitis, D. Chronic hyperplastic pulpitis
C: Acute suppurative pulpitis
Answer: C: Acute suppurative pulpitis 
Explanation: Acute pulpitis may result in formation of acute apical abscess which inturn may result in periapical granuloma or cyst and some times ending up in osteomyelitis.