This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematological Disorders, Subject name: Gynaecology & Obstetrics
[{'content': 'All predisposes to isoimmunisation in a Rh-ve female except. \nSelect and explain. \nA. Advaned maternal age, B. Antepartum haemorrhage, C. Caesarian section, D. Postdated pregnancy', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Advanced maternal age Following are the conditions predisposing to isoimmunization in Rh-ve femaleabortionchorionic villous samplingamniocentesisantepartum Haemorrhage attempted versioncaesarian section*manual removal of placenta Recent studies state that there is continuous feto-maternal bleed occurring throughout normal pregnancies. So it is not advisable to go beyond the expected date of pregnancy. Hence postdated pregnancy is another risk-factor for isoimmunization. *", 'role': 'assistant'}]