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
Absolute contraindication of OCP's is: 
Select and explain. 
A. Breast cancer, B. Mentally ill, C. Migraine, D. Fibroid
A: Breast cancer
Answer: A: Breast cancer 
Explanation: None