This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexuality and intersexuality, Subject name: Gynaecology & Obstetrics
A 19 year old patient came with C/o primary amenorrhea. She had well developed breasts and pubic hair. However there was absence of vagina and uterus. Likely diagnosis is 
Select and explain. 
A. Turners syndrome, B. Mullerian agensis, C. Kinefelter's syndrome-XXY, D. Gonadal agenesis
B: Mullerian agensis
Answer: B: Mullerian agensis 
Explanation: Mullerian agenesis : Physical appearance Normal breast development Normal sexual hair Average stature External genitalia Normal Internal genitalia Absence of vagina Absence of uterus D.C.DUTTA'S TEXTBOOK OF GYNAECOLOGY, Pg no:453, 6th edition