A 70-year old female has consumed optimal levels of fluorides all her life. You would expect to find a decreased incidence of
1. Paget's disease of bone.
2. osteoporosis.
3. hyperparathyroidism.
4. dental caries.

(4) only

All of the above

(1) (2) (3)

(1) and (3)

(2) and (4)