Which of the following options is correct: cranial bones develop a) from cartilage models b) within fibrous membranes c) from a tendon d) within osseous membranes?

The correct option is a) from cartilage models. Cranial bones primarily develop through a process called endochondral ossification, which involves the formation of cartilage models that are gradually replaced by bone. This process is essential for the proper formation of the skull during fetal development and early life.