This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Striking feature of the following condition is: 
Select and explain. 
A. Hypoplastic zygomatic bone, B. Absent zygomatic bone, C. Hypoplasia of lateral aspect of orbit, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Mandibulofacial Dysostosis (Treacher Collins Syndrome)
A striking finding is the hypoplastic or absent zygomatic bones, and hypoplasia of the lateral aspects of the orbits. The auditory canal, mastoid air cells, and articular eminence often are smaller than normal or absent. The maxilla and especially the mandible are hypoplastic, showing accentuation of the antegonial notch and a steep mandibular angle, which gives the impression that the body of the mandible is bending in an inferior and posterior direction. The ramus is especially short. The condyles are positioned posteriorly and inferiorly. The maxillary sinuses may be underdeveloped or absent.