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