Anterior 2/3 of tongue develops from: (A) 1st branchial arch, (B) 2nd branchial arch, (C) 3rd branchial arch, (D) 4th branchial arch
Answer is A. The anterior two-thirds: From two lingual swellings which arise from the first branchial arch. Therefore, it is supplied by lingual nerve of first arch and chorda tympani of second arch The posterior one-third: From cranial large pa of the hypobranchial eminence, that is from the third arch. Therefore, it is supplied by the glossopharyngeal nerve The posterior-most pa from the fouh arch. This is supplied by the vagus nerve <img src=" /> Ref BDC volume 3,sixth edition pg 270