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
A 15-year-old female presents with primary amenorrhea. Her breasts are normally developed but she has no axillary or public hair The most likely diagnosis is 
Select and explain. 
A. turner's syndrome, B. Testicular feminization syndrome, C. Mullerian agenesis, D. Premature ovarian failure
B: Testicular feminization syndrome
Answer: B: Testicular feminization syndrome 
Explanation: Testicular feminizing syndrome

Genotype is 46XY, Phenotype is female
The gonads are testes often present in the inguinal canal. 
Gonads produce testosterone and Mullerian inhibiting substance, but because of androgen insensitivity at target organs, Patients have
Lack of axillary and pubic hair and normally developed breasts 
Absent uterus and upper vagina 
May have a blind pouch of lower vagina