This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic and genetic disorders, Subject name: Pediatrics
[{'content': 'All are features in Treacher-collin syndrome except: \nSelect and explain. \nA. Coloboma of inferior lid, B. Mandibular hypoplasia, C. Low intelligence, D. Cleft palate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Intelligence is not affected in Treacher-Collin syndrome(like Turners syndrome) Treacher-Collins syndrome/Franceschetti syndrome Autosomal dominant Facial appearance: downward sloping palpebral fissures, colobomas and drooping of the lower eyelids, sunken cheekbones, deformed pinnae, atypical hair growth extending towards cheeks Facial clefts, malformed ears, deafness Hypoplastic mandible Ref: Nelson textbook of pediatrics 21st edition Pgno: 1917', 'role': 'assistant'}]