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': 'Intrauterine insemination means implantation of: \nSelect and explain. \nA. Semen, B. Washed semen, C. Million of sperm, D. Fertilized ova', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Intrauterine insemination is placement of 0.3mL of washed processed and concentrated sperms (devoid of seminal plasma)/semen into the intrauterine cavity by transcervical catheterization.', 'role': 'assistant'}]