This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Pierre Robin Sequence includes 
Select and explain. 
A. Glossoptosis, B. Airway obstructions, C. Cleft lip, D. Micrognathia
A: Glossoptosis
Answer: A: Glossoptosis 
Explanation: Pierre robin syndrome includes cleft palate retrognathia posteriorly displaced tongue(glossoptosis) early respiratory and feeding difficulties SRB ,5th,347.