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: Dental
Test tube retepegs are seen in the microscopic section of 
Select and explain. 
A. ANUG, B. Inflammatory gingival hyperplasia, C. Gingival enlargement due to dilantin sodium, D. Plasma cell gingivitis
C: Gingival enlargement due to dilantin sodium
Answer: C: Gingival enlargement due to dilantin sodium 
Explanation: None