<prompt> Special sensory supply of the marked area is nerve?HypoglossalLingualChorda tympaniGlossopharyngeal  <response>: Developing tongue: - 1st pharyngeal arch: - Anterior 23rd of tongue this pa will be developing from tuberculum impar two lingual swellings. General sensory nerve of anterior 23rd: - Lingual nerve - Branch Of mandibular V3 trigeminal V Special senses of anterior 23rd E.g: taste: - Chorda tympani neve - Branch Of facial nerve. IInd pharyngeal arch - minimal contribution to tongue development. - Disappear at a foramen CA - foramen caecum IIIrd pharyngeal arch - develops posterior 23rd of tongue. General sensation Special taste sensation IXth nerve IXth nerve. IVth pharyngeal arch - contributes to development of posterior most of tongue epiglottis. Nerve of IVth arch supplies the posterior most epiglottisvagus nerve . 