The nature of bone is true

Question

Which of the following statements about the nature of bone is true?

1. Bone is active, growing tissue with an extensive blood supply.
2. Bone is similar to cartilage, nearly inert, and with little blood supply.
3. Bone is active and living when formed by osteoblast but dies after it hardens.
4. Bone is nonliving calcium deposits and removing bone is a bloodless operation.
5. he outer compact bone is nonliving calcium, but the bone marrow is active living tissue.