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
Which of the following soft tissue responses may occur as a reaction to orthodontic bands? 
Select and explain. 
A. Marginal gingivitis, B. Gingival fibrosis, C. Ulcerative gingivitis, D. Fulminating periodontitis
A: Marginal gingivitis
Answer: A: Marginal gingivitis 
Explanation: None