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
An example of acute inflammatory gingival enlargement is most likely to be seen in patient exhibiting: 
Select and explain. 
A. Periodontal cyst, B. Pregnancy gingivitis, C. Dilantin hyperplasia, D. Hereditary fibromatosis
B: Pregnancy gingivitis
Answer: B: Pregnancy gingivitis 
Explanation: None