Pars intermedia of hypophysis cerebri from?: (A) Endoderm, (B) Mesoderm, (C) Oral ectoderm, (D) Neuroectoderm
Answer is C. 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)