Root canal therapy may be safely and successfully undertaken for
1. hemophiliacs.
2. patients with a history of rheumatic fever.
3. patients with rheumatoid arthritis.
4. cerebral palsy patients.
5. adolescent diabetics.

(1) (2) (3) (5)

(2) (3) (4)

(2) (3) (5)

None of the above.

All of the above.