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: Radiology
Which of the following is not a cause of the generalized increase in bone density in adults? 
Select and explain. 
A. Myelosclerosis, B. Renal osteodystrophy, C. Fluorosis, D. Caffey's disease
D: Caffey's disease
Answer: D: Caffey's disease 
Explanation: Caffey's disease (Infantile cortical hyperplasia) causes a generalized increase in bone density in children.
Causes of a generalized increase in bone density in adults:- Myeloproliferative disorders, myelosclerosis, renal osteodystrophy, poisoning (lead), fluorosis, osteoblastic metastasis, lymphoma, mastocytosis, Paget's disease, Metabolic (Hypercalcemia), and idiopathic.