<prompt> All are derived from branchial arch EXCEPT?Ultimobranchial bodyStapesLaryngeal cartilageMandible  <response>: Ans. a Ultimobranchial bodyRef: Inderbir Singhs Embroyology, 7th ed. 119-120 In humans, the ultimobranchial body is an embryological structure that gives rise to the calcitonin-producing cells--also called parafollicular cells or C cells--of the thyroid gland. In humans, this body is a derivative of the ventral recess of the fourth pharyngeal pouch. Stapes: from 2nd Branchial arch Laryngeal cartilage: from 6th branchial arch Mandible: from 1st branchial arch 