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: Pathology
In Treacher collin's syndrome there is: 
Select and explain. 
A. Upward sloping of the palpebral fissure, B. Poorly developed or absence of malar bones, C. Progenia and mandibular prognathism, D. No loss of hearing
B: Poorly developed or absence of malar bones
Answer: B: Poorly developed or absence of malar bones 
Explanation: None