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
The retrocuspid papilla is found approx 1mm below the free gingiva on the attached gingiva lingual to: 
Select and explain. 
A. Mandibular canine., B. Maxillary canine., C. Mandibular premolars, D. Maxillary premolars.
A: Mandibular canine.
Answer: A: Mandibular canine. 
Explanation: None