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': 'Which of the folowing statements about calendar method (Rhythm method) is false: \nSelect and explain. \nA. Abstinence is needed for only a few days in a month, B. It is associated with no costs, C. Safe period can also be observed using temperature rhythm or mucous method, D. Ectopic pregnancy is a reported complication of calendar method', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]