Question

where does new bone form during endochondral ossification? a on cartilage b on osteoblasts c on existing bone d on connective tissue

Explanation:

Endochondral ossification is a process where new bone forms on cartilage. Osteoblasts are cells involved in bone formation but not the site. New bone on existing bone is more related to appositional growth. Connective tissue is too general. Cartilage is the specific site for endochondral ossification.

Answer:

A. on cartilage