The embryonic development of the vestibule of the vagina is from which of the following developmental structures?
Genital ridge
Wolffian duct
Urogenital sinus
Mullerian duct
Clitoris develops from three swellings of the somato-pleurae known as genital tubercle, urogenital folds and labioscrotal folds, while urethra, vestibule and lower vagina are derived from the urogenital sinus.