This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
Marble Bone disease is ? 
Select and explain. 
A. Osteoporosis, B. Osteopoikilosis, C. Osteopetrosis, D. Fibrous Dysplasia
C: Osteopetrosis
Answer: C: Osteopetrosis 
Explanation: *Marble Bone disease is another name of Osteopetrosis/Albers-Schonberg Disease