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 female presents with Primary Amenorrhea. Examination shows a Short Blind Vagina, with absent Uterus. The Next Investiga- tion of choice is: \nSelect and explain. \nA. Karyotyping, B. IVP, C. Gonadotrophin levels, D. Serum Prolactin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]