This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Hyper parathyroidism is characterised by the following except - 
Select and explain. 
A. Generalised osteoporosis, B. Renal calculi, C. Hypercalcaemia, D. osteosclerosis
D: osteosclerosis
Answer: D: osteosclerosis 
Explanation: None