First arch is also called:

 # First arch is also called:

A. Hyoid arch 

B. Mandibular arch

C. Maxillary arch 

D. Pharyngeal arch

The correct answer is B. Mandibular arch.

The first arch in embryonic development is often referred to as the Mandibular arch. During the early stages of embryonic development, several structures form in a series of arches known as pharyngeal arches. These arches play a crucial role in the development of the face and neck.

The Mandibular arch, also known as the first pharyngeal arch, is the most anterior of the pharyngeal arches. It gives rise to various structures including the lower jaw (mandible), certain muscles of mastication (chewing), and some muscles of facial expression. The nerves and blood vessels associated with this arch also develop within it.

Each pharyngeal arch has a specific set of components that contribute to the formation of different structures. In the case of the Mandibular arch, it primarily gives rise to the lower jaw, muscles involved in chewing, and some facial muscles. The arches undergo complex growth, fusion, and differentiation processes to form the various structures of the face and neck during embryonic development.