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
[{'content': 'True about Dizygotic twins \nSelect and explain. \nA. Always same sex, B. Always different sex, C. Separate chorion and amnion, D. Blood group is always different', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dizygotic twins : There are two placentae, either completely separated or more commonly fused Fetus surrounded by a separate amnion and chorion Ref: Dutta Obs 9e pg 189.', 'role': 'assistant'}]