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: Pathology
Albers-Schonberg's disease is 
Select and explain. 
A. Osteomyelitis, B. Osteopetrosis, C. condensing osteitis, D. OsteomaLacia
B: Osteopetrosis
Answer: B: Osteopetrosis 
Explanation: None