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
[{'content': 'Blood transfusion is indicated in the following condition with sickle cell anaemia \nSelect and explain. \nA. Frequent sickling episodes, B. Twin pregnancy, C. Poor obstetrical outcome, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Indications of Blood transfusion in Sickle Cell Anemia\n\nFrequent sickling episodes\nTwin pregnancy\nPoor obstetrical outcome\nSevere anaemia\n\nBlood transfusion replaces the abnormal cells with normal red cells\nThe objective of transfusion is to keep the hematocrit value above 25% and concentration of Hb–Sunder 50%\xa0\nProphylactic transfusions during pregnancy remain controversial', 'role': 'assistant'}]