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': 'Asthenosperima means : \nSelect and explain. \nA. Failure of the formation of sperms, B. No spermatozoa in the semen, C. Reduction in the motility of sperms, D. Sperm count less than 20 million / ml of semen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Reduction in the motility of sperms', 'role': 'assistant'}]