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
Epithelium of vagina arises from? 
Select and explain. 
A. Ectoderm, B. Wolffian duct, C. Mesoderm, D. Mesonephric duct
C: Mesoderm
Answer: C: Mesoderm 
Explanation: Vagina is derived from two sources :- Upper 2/3rd : It is derived from Utero-Vaginal Canal, i.e. the fused pa of paramesonephric duct. Therefore, this pa is mesodermal in origin. Lower 1/3rd : It is derived from sinovaginal bulb which inturn is derived from urogenital sinus. Thus, this pa is endodermal in origin.