This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mullerian Abnormalities, Subject name: Gynaecology & Obstetrics
[{'content': 'Most likely feature in Mayer-Rokitansky-Kuster-Hauser syndrome along with primary amenorrhea is: \nSelect and explain. \nA. Ovary agenesis, B. Absent secondary sexual characteristics, C. Vaginal atresia, D. Bicornuate uterus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Mayer Rokitansky-Kuster-Hauser syndrome (Mullerian agenesis) Congenital hypoplasia or absence of the Vagina(Characteristic feature) in combination with abnormal or absent uterus, Second most common cause of Primary Amenorrhea, Karyotype- 46XX, Gonad- Ovary: normal and functional: responsible for normal external feminisation Mullerian structures don't develop. Primary amenorrhoea Paial or complete absence of vagina Wide array of uterine abnormalities Skeletal/renal and other associated abnormalities, A normal female appearance and secondary sexual characteristics", 'role': 'assistant'}]