Which of the following is NOT a type of embryonic ossification?

Embryonic ossification refers to the process by which bone forms in the developing embryo and can occur through several mechanisms. The two primary types are intramembranous and endochondral ossification.

Intramembranous ossification occurs directly from mesenchymal tissue and is responsible for the formation of flat bones, such as those in the skull. Endochondral ossification, on the other hand, involves the replacement of a cartilage model with bone, which is typical in the development of long bones like the femur.

The term "dermal" in the context of ossification is often used interchangeably with intramembranous ossification since it involves the formation of bone from the dermis of the skin. Conversely, "cartilaginous" is often associated with the endochondral process, as bones form through the transformation of cartilage.

Since dermal ossification is a recognized method of bone development and does not stand alone as an independent type of ossification, it is not considered a distinct category like intramembranous or endochondral ossification. Therefore, dermal ossification is not classified as a separate type of embryonic ossification, making it the correct choice for this question.