This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous ENT, Subject name: ENT
All are seen in Treacher-Collins syndrome except 
Select and explain. 
A. Conductive deafness, B. Cleft palate, C. Mandibular hypoplasia, D. Choanal atresia
D: Choanal atresia
Answer: D: Choanal atresia 
Explanation: Treacher-Collins syndrome (mandibulofacial dysostosis) : * Antimongoloid palpebral fissures * Coloboma of lower lid * Hypoplasia of mandible and malar bones * Microtia pinna and meatal atresia * Malformed malleus and incus (stapes normal) Ref: Textbook of ENT, Dhingra; 6th edition; Pg no: 116 ref img