This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parathyroid and adrenal glands, Subject name: Surgery
Hyperparathyroidism is characterized by the following except: 
Select and explain. 
A. Generalized osteoporosis, B. Renal calculi, C. Hypercalcemia, D. Osteosclerosis
D: Osteosclerosis
Answer: D: Osteosclerosis 
Explanation: Patients with PHPT(Primary hyperparathyroidism) formerly present with the "classic" pentad of symptoms:Kidney stonesPainful bonesAbdominal groansPsychic moansFatigue oveonesDiagnosis:- Elevated serum calcium and intact PTH or two-site PTH levels, without hypocalciuria establishes the diagnosis of PHPT