<prompt> A 50-year-old man presented with multiple pathological fractures. His serum calcium was 11.5 mgdl and phosphate was 2.5 mgdl. Alkaline phosphatase was 940 I.U.dl. The most probable diagnosis is -OsteoporosisOsteomalaciaMultiple myelomaHyperparathyroidism  <response>: Multiple pathological fractures, high calcium, low phosphate and high alkaline phosphatase suggest the diagnosis of hyperparathyroidism. 