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 girl presents with; primary amenorrhea; grade V thelarche, grade II pubarche; no axillary hair: likely diagnosis is : \nSelect and explain. \nA. Testicular feminisation syndrome, B. Mullerian agenesis, C. Turners syndrome, D. Gonadal dysgenesis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Testicular feminisation syndrome', 'role': 'assistant'}]