This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraception, Subject name: Gynaecology & Obstetrics
[{'content': 'Preferred method of contraception for a female with family H/O ovarian cancer : \nSelect and explain. \nA. POP, B. Cu IUCD, C. OCP, D. Barrier method', 'role': 'user'}, {'content': 'Answer: C \nExplanation: OCPs reduce ovarian cancer. TEXTBOOK OF GYNECOLOGY SHEILA BALAKRISHNAN SECOND EDITION PAGE NO 368 Table no 33.4', 'role': 'assistant'}]