Marble bone is characteristic of?: (A) Osteopetrosis, (B) Marfan's syndrome, (C) Osteogenesis imperfecta, (D) Melorheostosis
Answer is A. Ans AOsteopetrosis, also known as Marble bone disease, or Albers- Schonberg disease is an extremely rare inherited disorder whereby the bones harden, becoming denser due to defect in osteoclastic bone resorption.