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': 'Per Rectal palpation of uterus is done in : \nSelect and explain. \nA. Primigravida, B. Virgins, C. Grand multi paras, D. Placenta pre', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Virgins', 'role': 'assistant'}]