This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Placenta and Chorion Development, Subject name: Gynaecology & Obstetrics
The zone of fibrinoid degeneration where the trophoblast and the decidua meet is known as: 
Select and explain. 
A. Folds of Hoboken, B. Nitabuch's layer, C. Parietal decidua, D. Chorion
B: Nitabuch's layer
Answer: B: Nitabuch's layer 
Explanation: Ans. B. Nitabuch's layerThere is an area of fibroid degeneration, where trophoblast cells (covered with syncytium) meet the decidua. This zone is known as Nitabuch layer. This layer limits further invasion of the decidua by the trophoblast. The membrane is absent in placenta accreta.