This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
[{'content': 'Not a feature of Treacher-Collins syndrome: \nSelect and explain. \nA. Deafness, B. Colobomas of lower eyelid, C. Hypoplasia of zygomatic bone, D. Mongoloid slant of palpable fissure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Mongoloid slant of palpable fissureMandibulofacial dysostosis is also known as Franceschetti-Klein syndrome or Treacher-Collins syndrome.Important features are as under:MicrognathiaColobomas of lower eyelidSunken cheek bonesBlind fistulas between the angles of mouth and earsDeformed pinnasAtypical hair growth extending towards cheekReceding chinLarge mouthFacial cleftsDeafnessAnti-mongoloid palpable fissureHypoplasia of mid face and zygomatic bone', 'role': 'assistant'}]