A 65 yrs old woman became confused. Laboratory findings were: Calcium 4.8 mmol increased Caiciuria, decreased phosphate. Which is the most likely diagnosis?
a- Malignancy (osteolytic metastases)
b- Primary hyper parathyroidism
c- Idiopathic hypercalcaemia hypercalciuria
d- Paget’s disease
e- Multiple myeloma