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': 'Post coital test detects all of the following except: \nSelect and explain. \nA. Fallopian tube block, B. Cervical factor abnormality, C. Sperm count, D. Sperm abnormality', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]