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': 'Contraindications to OC pills:a) Heart diseaseb) Uterine malformationsc) Menorrhagiad) Liver failuree) Epilepsy \nSelect and explain. \nA. acd, B. ade, C. abd, D. ad', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]