This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
The placenta is formed from: 
Select and explain. 
A. Decidua basalis, B. Decidua vera, C. Chorion levae, D. Decidua capsularis
A: Decidua basalis
Answer: A: Decidua basalis 
Explanation: Ans: A (Decidua basalis) Ref: DC Dutta s Textbook of obstetrics, 7th edn, Pg 30Explanation:Fetal contribution for placental formation - Chorion frondosumMaternal contribution - Decidua basalts