Final answer:
The anterior faucial pillar is composed of the palatoglossus and palatopharyngeus muscles, which are responsible for elevating the back of the tongue and forming the superior and lateral margins of the fauces. Option C is correct.
Step-by-step explanation:
The correct answer to this question is C) Both A and B, which include the palatoglossus and palatopharyngeus muscles.
The palatoglossus muscle originates from the soft palate and is involved in elevating the back of the tongue, playing a role in swallowing. It forms the anterior pillar, which lies next to the base of the tongue.
The palatopharyngeus muscle extends from the lateral side of the soft palate to the side of the pharynx, creating the superior and lateral margins of the fauces and contributing to the palatopharyngeal arch.
Between these two arches are the palatine tonsils, important lymphoid tissue that helps protect the pharynx. Together, the palatoglossus and palatopharyngeus muscles comprise the anatomical structures known as the anterior faucial pillars, which flank the tonsils and aid in the actions of the soft palate.