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
Vaginal epithelium  develops from 
Select and explain. 
A. Meroderm of urogenital sinus, B. Meroderm of genital ridge, C. Endoderm of urogenital ridge, D. Endoderm of genital ridge
C: Endoderm of urogenital ridge
Answer: C: Endoderm of urogenital ridge 
Explanation: Vagina develops from merodum of parameronephric duct endodum of urogenital ridge.