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': 'Which of the following tests can differentiate MRKH from testicular feminizing syndrome \nSelect and explain. \nA. 3D USG, B. MRI, C. Karyotyping, D. Serum testosterone levels.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Karyotyping is best to differentiate between MRKH and testicular feminization syndrome.', 'role': 'assistant'}]