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': 'Rokitanski-Kuster Hauser syndrome is associated with: \nSelect and explain. \nA. Ovarian agenesis, B. Absent fallopian tube, C. Vaginal atresia, D. Bicornuate uterus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Vaginal atresia) : Congenital hypoplasia or absence of vagina in combination with an abnormal or absent uterus is called Meyer Rokitansky Kuster Houser Syndrome. This is the second most common cause of Primary amenorrhea after gonadal dysgenesis.', 'role': 'assistant'}]