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': 'A 16 year old girl with blind vagina and absent uterus presents to you. The investigation you will like to do first is : \nSelect and explain. \nA. Intravenous pyelography, B. FSH, C. Karyotyping, D. CT scan of pelvis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Karyotyping', 'role': 'assistant'}]