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: Anatomy
Developmentally stomodeum is separated from the pharynx dorsally by: 
Select and explain. 
A. Pharyngeal arch, B. Buccopharyngeal membrane, C. Rathke's pouch, D. Mandibular process
B: Buccopharyngeal membrane
Answer: B: Buccopharyngeal membrane 
Explanation: None