During the extraction of a primary tooth, when is it appropriate to leave root tips in the socket?
1. There is no infection in the area.
2. Root tip size is less than 2 mm.
3. Tips will not interfere with ensuing restorative procedures.
4. Tips will not interfere with development or eruption of permanent teeth.

All of the above.

(4) only

(2) and (4)

(1) and (3)

(1) (2) (3)