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 is a reactive lesion of the gingiva that may demonstrate bone radiographically and often even microscopically? 
Select and explain. 
A. Osteoma, B. Peripheral ossifying fibroma, C. Traumatic neuroma, D. Irritation fibroma
B: Peripheral ossifying fibroma
Answer: B: Peripheral ossifying fibroma 
Explanation: None