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
[{'content': 'The placenta is formed from: \nSelect and explain. \nA. Decidua basalis, B. Decidua vera, C. Chorion levae, D. Decidua capsularis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]