system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Urachus fistula is :
assistant
The correct answer is  A i.e. Patent allantoisUrorectal septum separates cloaca into (anterior) primitive urogenital sinus and (posterior) primitive anorectal canalQ. Urachzis fistula develops from patent allantoisQ.