481. The anterior relation of the middle ear cavity is______________? A. Chorda tympani B. Tegmen tympani C. Tensor tympani D. Facial nerve ✅ The correct answer is option C. Tensor tympani.
482. Motor supply of infrahyoid muscle is______________? A. Branches of cervical plexus B. Vagus nerve C. Glossopharyngeal nerve D. Mandibular nerve ✅ The correct answer is option A. Branches of cervical plexus.
483. Oral diaphragm is formed by_________________? A. Mylohyoid muscle B. Genioglossus muscle C. Buccinator muscle D. Orbicularis oris muscle ✅ The correct answer is option A. Mylohyoid muscle.
484. The left subclavian artery is a branch of_______________? A. Brachio cephalic trunk B. Ascending aorta C. Arch of aorta D. Left common carotid ✅ The correct answer is option C. Arch of aorta.
485. All are true of mandibular nerve except________________? A. Sensory branch arises from anterior trunk B. Muscles of mastication are innervated by branches of main trunk C. Nerve to medial pterygoid arises from main trunk D. Buccal nerve innervated buccinator muscle ✅ The correct answer is option B. Muscles of mastication are innervated by branches of main trunk.
486. Occipital artery is a branch of _________________? A. Internal carotid artery B. Posterior branch of External carotid C. Medial branch of external carotid D. Anterior branch of external carotid ✅ The correct answer is option B. Posterior branch of External carotid.
487. The ansa cervicalis innervates which muscle_______________? A. Mylohyoid B. Cricothyroid C. Stylohyoid D. Sternothyroid ✅ The correct answer is option D. Sternothyroid.
488. Parasympathetic nerve supply to salivary gland is by_______________? A. IX & VII cranial Nerves B. V & IX cranial Nerves C. V & X cranial Nerves D. IX & X cranial Nerves ✅ The correct answer is option A. IX & VII cranial Nerves.
489. Bone better described as ” bat with extended wings” is________________? A. Ethmoid B. Sphenoid C. Nasal D. Mandible ✅ The correct answer is option B. Sphenoid.
490. What is true about pharyngotympanic tube ( Eustachian tube) ? A. It opens into oropharynx B. Supplied by IX nerve C. Lined stratified squamous epithelium D. It is cartilaginous throughout its length ✅ The correct answer is option B. Supplied by IX nerve.