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
At distal end of mandibular arch pear shaped structure which is composed of typical gingival tissue known as? 
Select and explain. 
A. Retromolar pad, B. Retromolar papilla, C. Pterygomandibular raphe, D. Masseteric notch
B: Retromolar papilla
Answer: B: Retromolar papilla 
Explanation: Retromoplar papilla:

It is an scar/remnants of gingival tissue of last mandibular molar extraction

Retromolar Pad:

Triangular pad of soft tissue at distal end of lower ridge.