<prompt> . A patient has loss of sensation at angle of mandible jaw and parotid area. Which of the following nerve is most likely to be injured.Mandibular nerveAuriculotemporal nerveLesser occipital nerveGreater auricular nerve  <response>: D i.e. Great auricular nerve Angle of mandible is supplied by great auricular nerve C2,3Q Tip of nose is supplied by ophthalmic division of trigeminalQ; and side and alae of nose is supplied by maxillary division of trigeminal nerveQThe skin of face is supplied by three divisions of trigeminal nerve, except for the small area over the angle of mandible and parotid gland which is supplied by great auricular nerveQ C2, C3Spatial representation of face in spinal nucleus of trigeminal nerve paicularly for pain is more akin to an onion skin pattern with fibers from central area of face reaching the highest cranial pa of nucleus fibers from more posterior pa passing to progressively lower caudal levels of nucleus. 