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': "All the following are the Non-contraceptive use of OCP's,  except \nSelect and explain. \nA. Carcinoma endometrium, B. Carcinoma breast, C. Rheumatoid arthritis, D. Endometriosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]