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
Osteopetrosis is also known as: 
Select and explain. 
A. Albers Schonberg disease, B. Marble bone disease, C. Fragilis generalisata, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Osteopetrosis aka Marble bone disease, Albers-Schönberg disease, osteosclerosis fragilis generalisata.
Ref: Shafer's textbook of oral pathology 7th edition page 704