The apical region of a non-vital tooth with a deep carious lesion may radiographically show
1. widening of the periodontal space.
2. loss of lamina dura.
3. a circumscribed radiolucency.
4. calcification of the periodontal membrane

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only

All of the above.