Question

The U-shaped bone present at the base of the buccal cavity is called
(a) Hyoid
(b) Maxilla
(c) Mandible
(d) Zygomatic

Answer 1

They are also referred to as lingual bone or tongue-bone. They’re situated within the anterior midline of the neck between the chin and the thyroid cartilage. They provide attachment to the muscles of the floor of the mouth.

Complete answer:
A single U-shaped bone that is present at the bottom of the cavity is named as Hyoid. It’s a U-shaped bone located within the anterior neck. It’s an intermediary between the skull and postcranial skeleton. The hyoid aids tongue movement and swallowing. It’s no articulation with other bones.
Zygomatic: They're a paired irregular bone. It situated at the upper and lateral a part of the face and forms the prominence of the cheek, a part of the lateral wall and floor of the orbit, and a section of the temporal fossa and the infratemporal fossa. It presents a malar and a temporal surface. Maxilla: They're the bone that forms your upper jawbone. The proper and left halves of the maxilla are irregularly shaped bones that fuse together within the middle of the skull, below the nose, in a region referred to as the intermaxillary suture. The maxilla may be a major bone of the face. Mandible: They're a mandible or jawbone is the largest, strongest, and lowest bone within the human facial skeleton. It forms the lower jaw and holds the lower teeth in situ. The mandible sits beneath the maxilla.
So, the correct answer is ‘hyoid’.

Note: Blood is supplied to the hyoid via the lingual artery, which runs down from the tongue to the greater horns of the bone. They thought to play a key role in keeping the upper airway open during sleep, and intrinsically, the event and treatment of obstructive sleep disorder.