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: ENT
Pierre Robbin syndrome does not include 
Select and explain. 
A. Hearing loss, B. Respiratory distress, C. Coloboma Iris, D. Mandibular dysplasia
C: Coloboma Iris
Answer: C: Coloboma Iris 
Explanation: None