This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
Pars intermedia of hypophysis cerebri from? 
Select and explain. 
A. Endoderm, B. Mesoderm, C. Oral ectoderm, D. Neuroectoderm
C: Oral ectoderm
Answer: C: Oral ectoderm 
Explanation: The intermediate pas of pituitary gland develop from an ectodermal diveiculum called RATHKE&;S pouchThis grows upwards from the roof of stomatodaeum, just in front of buccopharyngeal membrane.(Ref: human embryology by IB Singh 9th edition,pg-310)