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: Medicine
[{'content': "A 15 year old female presents with primary amenorrhoea. Her breasts are Tanner 4 but she has no axillary or pubic hair. The most likely diagnosis is : \nSelect and explain. \nA. Turner's syndrome, B. Mullerian agensis, C. Testicular feminization syndrome, D. Premature ovarian failure", 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Testicular feminization syndrome): Presence of well developed breast (tanner stage 4) with scanty axillary or pubic hair in a phenotypic 'female' with primary amenorrhea (? no uterus) suggests the diagnosis of Testicular feminization syndrome.", 'role': 'assistant'}]