A well circumscribed 3mm radiolucency in the apical region of the mandibular second premolar may be
1. a periapical granuloma.
2. a periapical cyst.
3. a chronic periapical abscess.
4. the mental foramen

All of the above.

(4) only

(2) and (4)

(1) and (3)

(1) (2) (3)