This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
The folds of Hoboken are found in : 
Select and explain. 
A. Amnion, B. Placenta, C. Uterus, D. Umbilical cord
D: Umbilical cord
Answer: D: Umbilical cord 
Explanation: Folds of Hoboken are transverse intimal folds protruding into the lumen of umbilical aeries.