This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Embryology 1, Subject name: Anatomy
Connecting Stalk forms 
Select and explain. 
A. primary umblical cord, B. secondary umblical cord, C. decidua paritalis, D. decidua capsularis
A: primary umblical cord
Answer: A: primary umblical cord 
Explanation: Connecting Stalk forms primary Umbilical Cord .