Sensory supply to tonsil is by which nerve?: (A) Greater palatine nerve, (B) Lesser palatine nerve, (C) Vagus, (D) Glossopharyngeal nerve
Answer is D. Ninth nerve (glossopharyngeal) is the nerve of third branchial arch. It carries sensory fibres from the posterior one-third of tongue, tonsil, pharynx, middle, ear, taste fibres from posterior one-third of tongue and circumvallate papillae. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.