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': 'True about chorionic villi biopsy:a) Strongly associated with fascio mandibular defectsb) Done in 10-12 weeksc) Rh immunoglobulin prophylaxis is not necessaryd) Done to diagnose genetic disorders \nSelect and explain. \nA. acd, B. bcd, C. abd, D. ab', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Remember after CVS:\n\nAnti-D immunoglobulin 50 m gm IM should be administered to a Rh-negtive woman.', 'role': 'assistant'}]