This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
The expelled products in ectopic pregnancy originate from : 
Select and explain. 
A. Decidua basalis, B. Decidua vera, C. Chorionic villi, D. Decidua Capsularis
B: Decidua vera
Answer: B: Decidua vera 
Explanation: Decidua vera