This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Kartageners syndrome cause of infertility is? \nSelect and explain. \nA. Oligospermia, B. Asthenospermia, C. Undescended testis, D. Epididymis obstruction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) AsthenospermiaAsthenozoospermia (or asthenospermia) is the medical term for reduced sperm motility due to defect in ciliary movement', 'role': 'assistant'}]