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': 'Absolute contraindication of OC pill is : \nSelect and explain. \nA. Breast Ca, B. Mentally ill, C. Migraine, D. Fibroid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Breast cancer', 'role': 'assistant'}]